diff --git a/scripts/opt-comp-experiment.py b/scripts/opt-comp-experiment.py
index 389367b4..363a2e0b 100755
--- a/scripts/opt-comp-experiment.py
+++ b/scripts/opt-comp-experiment.py
@@ -98,7 +98,7 @@ def compress_worker(
             out_f=out_f,
             opt_comp=opt_comp,
             cb=Callback(),
-            cb_return=CallbackReturn(),
+            _cb_return=CallbackReturn(),
         )
         results_queue.put(
             (
diff --git a/scripts/update-xcode-imessage-iconset.py b/scripts/update-xcode-imessage-iconset.py
index b1d45d3f..1fdfc5c0 100644
--- a/scripts/update-xcode-imessage-iconset.py
+++ b/scripts/update-xcode-imessage-iconset.py
@@ -5,16 +5,16 @@
 ROOT_DIR = Path(__file__).parents[1]
 
 
-def main():
+def main() -> None:
     xcode_imessage_iconset: Dict[str, Tuple[int, int]] = {}
 
     with open(
         ROOT_DIR
         / "src/sticker_convert/ios-message-stickers-template/stickers StickerPackExtension/Stickers.xcstickers/iMessage App Icon.stickersiconset/Contents.json"
     ) as f:
-        dict = json.load(f)
+        contents_json = json.load(f)
 
-    for i in dict["images"]:
+    for i in contents_json["images"]:
         filename = i["filename"]
         size = i["size"]
         size_w = int(size.split("x")[0])
diff --git a/src/sticker_convert/cli.py b/src/sticker_convert/cli.py
index 618f2e60..b0bae506 100755
--- a/src/sticker_convert/cli.py
+++ b/src/sticker_convert/cli.py
@@ -1,6 +1,7 @@
 #!/usr/bin/env python3
 import argparse
 import signal
+import sys
 from argparse import Namespace
 from json.decoder import JSONDecodeError
 from math import ceil
@@ -28,7 +29,7 @@ def cli(self) -> None:
         try:
             from sticker_convert.utils.files.json_resources_loader import COMPRESSION_JSON, EMOJI_JSON, HELP_JSON, INPUT_JSON, OUTPUT_JSON
         except RuntimeError as e:
-            self.cb.msg(e.__str__())
+            self.cb.msg(str(e))
             return
 
         self.help = HELP_JSON
@@ -181,7 +182,7 @@ def cli(self) -> None:
 
         signal.signal(signal.SIGINT, job.cancel)
         status = job.start()
-        exit(status)
+        sys.exit(status)
 
     def get_opt_input(self, args: Namespace) -> InputOption:
         download_options = {
@@ -207,7 +208,7 @@ def get_opt_input(self, args: Namespace) -> InputOption:
                 self.cb.msg(f"Detected URL input source: {download_option}")
             else:
                 self.cb.msg(f"Error: Unrecognied URL input source for url: {url}")
-                exit()
+                sys.exit()
 
         opt_input = InputOption(
             option=download_option,
diff --git a/src/sticker_convert/converter.py b/src/sticker_convert/converter.py
index 9c554b25..95cedda0 100755
--- a/src/sticker_convert/converter.py
+++ b/src/sticker_convert/converter.py
@@ -11,15 +11,15 @@
 import numpy as np
 from PIL import Image
 
-if TYPE_CHECKING:
-    from av.video.plane import VideoPlane  # type: ignore
-
 from sticker_convert.job_option import CompOption
 from sticker_convert.utils.callback import Callback, CallbackReturn
 from sticker_convert.utils.files.cache_store import CacheStore
 from sticker_convert.utils.media.codec_info import CodecInfo
 from sticker_convert.utils.media.format_verify import FormatVerify
 
+if TYPE_CHECKING:
+    from av.video.plane import VideoPlane  # type: ignore
+
 CbQueueItemType = Union[
     Tuple[str, Optional[Tuple[str]], Optional[Dict[str, str]]],
     str,
@@ -45,8 +45,8 @@ def rounding(value: float) -> Decimal:
 
 
 def get_step_value(
-    max: Optional[int],
-    min: Optional[int],
+    max_step: Optional[int],
+    min_step: Optional[int],
     step: int,
     steps: int,
     power: float = 1.0,
@@ -62,14 +62,12 @@ def get_step_value(
     else:
         factor = 0
 
-    if max is not None and min is not None:
-        v = round((max - min) * step / steps * factor + min)
+    if max_step is not None and min_step is not None:
+        v = round((max_step - min_step) * step / steps * factor + min_step)
         if even is True and v % 2 == 1:
             return v + 1
-        else:
-            return v
-    else:
-        return None
+        return v
+    return None
 
 
 def useful_array(
@@ -151,7 +149,7 @@ def convert(
         out_f: Path,
         opt_comp: CompOption,
         cb: "Union[Queue[CbQueueItemType], Callback]",
-        cb_return: CallbackReturn,
+        _cb_return: CallbackReturn,
     ) -> Tuple[bool, Path, Union[None, bytes, Path], int]:
         sticker = StickerConvert(in_f, out_f, opt_comp, cb)
         result = sticker._convert()
@@ -272,8 +270,8 @@ def check_if_compatible(self) -> Optional[bytes]:
                 self.result_size = len(self.in_f)
 
             return result
-        else:
-            return None
+
+        return None
 
     def generate_steps_list(self) -> List[Tuple[Optional[int], ...]]:
         steps_list: List[Tuple[Optional[int], ...]] = []
@@ -378,7 +376,7 @@ def frames_import(self) -> None:
     def _frames_import_pillow(self) -> None:
         with Image.open(self.in_f) as im:
             # Note: im.convert("RGBA") would return rgba image of current frame only
-            if "n_frames" in im.__dir__():
+            if "n_frames" in dir(im):
                 for i in range(im.n_frames):
                     im.seek(i)
                     self.frames_raw.append(np.asarray(im.convert("RGBA")))
@@ -764,10 +762,10 @@ def quantize(self, image: Image.Image) -> Image.Image:
             return image.copy()
         if self.opt_comp.quantize_method == "imagequant":
             return self._quantize_by_imagequant(image)
-        elif self.opt_comp.quantize_method == "fastoctree":
+        if self.opt_comp.quantize_method == "fastoctree":
             return self._quantize_by_fastoctree(image)
-        else:
-            return image
+
+        return image
 
     def _quantize_by_imagequant(self, image: Image.Image) -> Image.Image:
         import imagequant  # type: ignore
@@ -812,17 +810,17 @@ def fix_fps(self, fps: float) -> Fraction:
             #
             # For GIF, we need to adjust fps such that delay is matching to hundreths of second
             return self._fix_fps_duration(fps, 100)
-        elif self.out_f.suffix in (".webp", ".apng", ".png"):
+        if self.out_f.suffix in (".webp", ".apng", ".png"):
             return self._fix_fps_duration(fps, 1000)
-        else:
-            return self._fix_fps_pyav(fps)
+
+        return self._fix_fps_pyav(fps)
 
     def _fix_fps_duration(self, fps: float, denominator: int) -> Fraction:
         delay = int(rounding(denominator / fps))
         fps_fraction = Fraction(denominator, delay)
         if self.opt_comp.fps_max and fps_fraction > self.opt_comp.fps_max:
             return Fraction(denominator, (delay + 1))
-        elif self.opt_comp.fps_min and fps_fraction < self.opt_comp.fps_min:
+        if self.opt_comp.fps_min and fps_fraction < self.opt_comp.fps_min:
             return Fraction(denominator, (delay - 1))
         return fps_fraction
 
diff --git a/src/sticker_convert/definitions.py b/src/sticker_convert/definitions.py
index 5a144a77..dfd8d791 100644
--- a/src/sticker_convert/definitions.py
+++ b/src/sticker_convert/definitions.py
@@ -48,8 +48,7 @@ def check_root_dir_exe_writable() -> bool:
         or "site-packages" in ROOT_DIR_EXE.as_posix()
     ):
         return False
-    else:
-        return True
+    return True
 
 
 ROOT_DIR_EXE_WRITABLE = check_root_dir_exe_writable()
@@ -58,13 +57,11 @@ def check_root_dir_exe_writable() -> bool:
 def get_default_dir() -> Path:
     if ROOT_DIR_EXE_WRITABLE:
         return ROOT_DIR_EXE
-    else:
-        home_dir = Path.home()
-        desktop_dir = home_dir / "Desktop"
-        if desktop_dir.is_dir():
-            return desktop_dir
-        else:
-            return home_dir
+    home_dir = Path.home()
+    desktop_dir = home_dir / "Desktop"
+    if desktop_dir.is_dir():
+        return desktop_dir
+    return home_dir
 
 
 # Default directory for stickers_input and stickers_output
@@ -79,9 +76,8 @@ def get_config_dir() -> Path:
 
     if ROOT_DIR_EXE_WRITABLE:
         return ROOT_DIR_EXE
-    else:
-        os.makedirs(fallback_dir, exist_ok=True)
-        return fallback_dir
+    os.makedirs(fallback_dir, exist_ok=True)
+    return fallback_dir
 
 
 # Directory for saving configs
diff --git a/src/sticker_convert/downloaders/download_base.py b/src/sticker_convert/downloaders/download_base.py
index e53857d1..c8b74d9e 100755
--- a/src/sticker_convert/downloaders/download_base.py
+++ b/src/sticker_convert/downloaders/download_base.py
@@ -75,8 +75,7 @@ def download_file(
 
                 if response.status_code != 200:
                     return b""
-                else:
-                    self.cb.put(f"Downloading {url}")
+                self.cb.put(f"Downloading {url}")
 
                 if show_progress:
                     steps = (total_length / chunk_size) + 1
@@ -101,11 +100,10 @@ def download_file(
 
         if not result:
             return b""
-        elif dest:
+        if dest:
             with open(dest, "wb+") as f:
                 f.write(result)
             msg = f"Downloaded {url}"
             self.cb.put(msg)
             return b""
-        else:
-            return result
+        return result
diff --git a/src/sticker_convert/downloaders/download_kakao.py b/src/sticker_convert/downloaders/download_kakao.py
index a6f5378e..48bc224f 100755
--- a/src/sticker_convert/downloaders/download_kakao.py
+++ b/src/sticker_convert/downloaders/download_kakao.py
@@ -41,7 +41,7 @@ def get_info_from_share_link(url: str) -> Tuple[Optional[str], Optional[str]]:
         data_urls = app_scheme_link_tag.get("data-url")
         if not data_urls:
             return None, None
-        elif isinstance(data_urls, list):
+        if isinstance(data_urls, list):
             data_url = data_urls[0]
         else:
             data_url = data_urls
@@ -113,7 +113,7 @@ def get_title_from_id(item_code: str, auth_token: str) -> Optional[str]:
 
 class DownloadKakao(DownloadBase):
     def __init__(self, *args: Any, **kwargs: Any) -> None:
-        super(DownloadKakao, self).__init__(*args, **kwargs)
+        super().__init__(*args, **kwargs)
         self.pack_title: Optional[str] = None
         self.author: Optional[str] = None
 
@@ -129,13 +129,10 @@ def download_stickers_kakao(self) -> bool:
 
             if item_code:
                 return self.download_animated(item_code)
-            else:
-                self.cb.put(
-                    "Download failed: Cannot download metadata for sticker pack"
-                )
-                return False
+            self.cb.put("Download failed: Cannot download metadata for sticker pack")
+            return False
 
-        elif self.url.isnumeric() or self.url.startswith("kakaotalk://store/emoticon/"):
+        if self.url.isnumeric() or self.url.startswith("kakaotalk://store/emoticon/"):
             item_code = self.url.replace("kakaotalk://store/emoticon/", "")
 
             self.pack_title = None
@@ -150,7 +147,7 @@ def download_stickers_kakao(self) -> bool:
 
             return self.download_animated(item_code)
 
-        elif urlparse(self.url).netloc == "e.kakao.com":
+        if urlparse(self.url).netloc == "e.kakao.com":
             self.pack_title = self.url.replace("https://e.kakao.com/t/", "")
             (
                 self.author,
@@ -172,24 +169,22 @@ def download_stickers_kakao(self) -> bool:
                 item_code = MetadataKakao.get_item_code(title_ko, auth_token)
                 if item_code:
                     return self.download_animated(item_code)
+                msg = "Warning: Cannot get item code.\n"
+                msg += "Is auth_token invalid / expired? Try to regenerate it.\n"
+                msg += "Continue to download static stickers instead?"
+                self.cb.put(("ask_bool", (msg,), None))
+                if self.cb_return:
+                    response = self.cb_return.get_response()
                 else:
-                    msg = "Warning: Cannot get item code.\n"
-                    msg += "Is auth_token invalid / expired? Try to regenerate it.\n"
-                    msg += "Continue to download static stickers instead?"
-                    self.cb.put(("ask_bool", (msg,), None))
-                    if self.cb_return:
-                        response = self.cb_return.get_response()
-                    else:
-                        response = False
-
-                    if response is False:
-                        return False
+                    response = False
+
+                if response is False:
+                    return False
 
             return self.download_static(thumbnail_urls)
 
-        else:
-            self.cb.put("Download failed: Unrecognized URL")
-            return False
+        self.cb.put("Download failed: Unrecognized URL")
+        return False
 
     def download_static(self, thumbnail_urls: str) -> bool:
         MetadataHandler.set_metadata(
diff --git a/src/sticker_convert/downloaders/download_line.py b/src/sticker_convert/downloaders/download_line.py
index d6197d80..4ffff948 100755
--- a/src/sticker_convert/downloaders/download_line.py
+++ b/src/sticker_convert/downloaders/download_line.py
@@ -23,7 +23,7 @@
 from sticker_convert.utils.files.metadata_handler import MetadataHandler
 from sticker_convert.utils.media.apple_png_normalize import ApplePngNormalize
 
-"""Reference: https://github.com/doubleplusc/Line-sticker-downloader/blob/master/sticker_dl.py"""
+# Reference: https://github.com/doubleplusc/Line-sticker-downloader/blob/master/sticker_dl.py
 
 
 class MetadataLine:
@@ -162,7 +162,7 @@ def get_metadata_stickers(
 
 class DownloadLine(DownloadBase):
     def __init__(self, *args: Any, **kwargs: Any) -> None:
-        super(DownloadLine, self).__init__(*args, **kwargs)
+        super().__init__(*args, **kwargs)
         self.headers = {
             "referer": "https://store.line.me",
             "user-agent": "Android",
@@ -444,13 +444,13 @@ def download_stickers_line(self) -> bool:
             self.decompress_stickers(zip_file)
 
         custom_sticker_text_urls: List[Tuple[str, Path]] = []
-        if self.sticker_text_dict != {} and (
+        if self.sticker_text_dict and (
             self.resource_type == "PER_STICKER_TEXT"
-            or (self.resource_type == "NAME_TEXT" and self.cookies != {})
+            or (self.resource_type == "NAME_TEXT" and self.cookies)
         ):
             self.edit_custom_sticker_text()
             custom_sticker_text_urls = self.get_custom_sticker_text_urls()
-        elif self.resource_type == "NAME_TEXT" and self.cookies == {}:
+        elif self.resource_type == "NAME_TEXT" and not self.cookies:
             self.cb.put('Warning: Line "Custom stickers" is supplied as input')
             self.cb.put(
                 "However, adding custom message requires Line cookies, and it is not supplied"
diff --git a/src/sticker_convert/downloaders/download_signal.py b/src/sticker_convert/downloaders/download_signal.py
index d49e977e..af6139ae 100755
--- a/src/sticker_convert/downloaders/download_signal.py
+++ b/src/sticker_convert/downloaders/download_signal.py
@@ -1,7 +1,7 @@
 #!/usr/bin/env python3
 from pathlib import Path
 from queue import Queue
-from typing import Any, Dict, Optional, Union
+from typing import Dict, Optional, Union
 
 import anyio
 from signalstickers_client import StickersClient  # type: ignore
@@ -17,8 +17,8 @@
 
 
 class DownloadSignal(DownloadBase):
-    def __init__(self, *args: Any, **kwargs: Any) -> None:
-        super(DownloadSignal, self).__init__(*args, **kwargs)
+    # def __init__(self, *args: Any, **kwargs: Any) -> None:
+    #     super().__init__(*args, **kwargs)
 
     @staticmethod
     async def get_pack(pack_id: str, pack_key: str) -> StickerPack:
diff --git a/src/sticker_convert/downloaders/download_telegram.py b/src/sticker_convert/downloaders/download_telegram.py
index b92921ea..c7b6ce88 100755
--- a/src/sticker_convert/downloaders/download_telegram.py
+++ b/src/sticker_convert/downloaders/download_telegram.py
@@ -1,7 +1,7 @@
 #!/usr/bin/env python3
 from pathlib import Path
 from queue import Queue
-from typing import Any, Dict, Optional, Union
+from typing import Dict, Optional, Union
 from urllib.parse import urlparse
 
 import anyio
@@ -16,8 +16,8 @@
 
 
 class DownloadTelegram(DownloadBase):
-    def __init__(self, *args: Any, **kwargs: Any) -> None:
-        super(DownloadTelegram, self).__init__(*args, **kwargs)
+    # def __init__(self, *args: Any, **kwargs: Any) -> None:
+    #     super().__init__(*args, **kwargs)
 
     def download_stickers_telegram(self) -> bool:
         self.token = ""
diff --git a/src/sticker_convert/gui.py b/src/sticker_convert/gui.py
index e4cefcd2..31ab733a 100755
--- a/src/sticker_convert/gui.py
+++ b/src/sticker_convert/gui.py
@@ -35,7 +35,7 @@
 
 class GUI(Window):
     def __init__(self) -> None:
-        super(GUI, self).__init__(themename="darkly", alpha=0)  # type: ignore
+        super().__init__(themename="darkly", alpha=0)  # type: ignore
         self.init_done = False
         self.load_jsons()
 
@@ -224,7 +224,7 @@ def load_jsons(self) -> None:
         try:
             from sticker_convert.utils.files.json_resources_loader import COMPRESSION_JSON, EMOJI_JSON, HELP_JSON, INPUT_JSON, OUTPUT_JSON
         except RuntimeError as e:
-            self.cb_msg(e.__str__())
+            self.cb_msg(str(e))
             return
 
         self.help = HELP_JSON
@@ -399,12 +399,12 @@ def get_output_name(self) -> str:
             if v["full_name"] == self.output_option_true_var.get()
         ][0]
 
-    def get_output_display_name(self) -> str:
-        return [
-            k
-            for k, v in self.output_presets.items()
-            if v["full_name"] == self.output_option_display_var.get()
-        ][0]
+    # def get_output_display_name(self) -> str:
+    #     return [
+    #         k
+    #         for k, v in self.output_presets.items()
+    #         if v["full_name"] == self.output_option_display_var.get()
+    #     ][0]
 
     def get_preset(self) -> str:
         selection = self.comp_preset_var.get()
@@ -412,13 +412,11 @@ def get_preset(self) -> str:
             output_option = self.get_output_name()
             if output_option == "imessage":
                 return "imessage_small"
-            elif output_option == "local":
+            if output_option == "local":
                 return selection
-            else:
-                return output_option
+            return output_option
 
-        else:
-            return selection
+        return selection
 
     def start_job(self) -> None:
         self.save_config()
@@ -569,7 +567,7 @@ def set_inputs(self, state: str) -> None:
             self.input_frame.cb_input_option()
             self.comp_frame.cb_no_compress()
 
-    def exec_in_main(self, evt: Any) -> Any:
+    def exec_in_main(self, _evt: Any) -> Any:
         if self.action:
             self.response = self.action()
         self.response_event.set()
@@ -617,10 +615,10 @@ def cb_msg(self, *args: Any, **kwargs: Any) -> None:
 
     def cb_msg_block(
         self,
+        *args: Any,
         message: Optional[str] = None,
         parent: Optional[object] = None,
-        *args: Any,
-        **kwargs: Any,
+        **_kwargs: Any,
     ) -> Any:
         if message is None and len(args) > 0:
             message = " ".join(str(i) for i in args)
@@ -638,10 +636,10 @@ def cb_msg_block(
 
     def cb_bar(
         self,
+        *args: Any,
         set_progress_mode: Optional[str] = None,
         steps: int = 0,
         update_bar: bool = False,
-        *args: Any,
         **kwargs: Any,
     ):
         with self.bar_lock:
@@ -659,13 +657,10 @@ def highlight_fields(self) -> bool:
         # output_option_display = self.get_output_display_name()
         url = self.input_address_var.get()
 
-        if (
+        in_out_dir_same = (
             Path(self.input_setdir_var.get()).absolute()
             == Path(self.output_setdir_var.get()).absolute()
-        ):
-            in_out_dir_same = True
-        else:
-            in_out_dir_same = False
+        )
 
         # Input
         if in_out_dir_same is True:
diff --git a/src/sticker_convert/gui_components/frames/comp_frame.py b/src/sticker_convert/gui_components/frames/comp_frame.py
index 08105f2d..cf1e6bdb 100644
--- a/src/sticker_convert/gui_components/frames/comp_frame.py
+++ b/src/sticker_convert/gui_components/frames/comp_frame.py
@@ -3,17 +3,17 @@
 
 from ttkbootstrap import Button, Checkbutton, Entry, Label, LabelFrame, OptionMenu  # type: ignore
 
-if TYPE_CHECKING:
-    from sticker_convert.gui import GUI  # type: ignore
-
 from sticker_convert.gui_components.frames.right_clicker import RightClicker
 from sticker_convert.gui_components.windows.advanced_compression_window import AdvancedCompressionWindow
 
+if TYPE_CHECKING:
+    from sticker_convert.gui import GUI  # type: ignore
+
 
 class CompFrame(LabelFrame):
     def __init__(self, gui: "GUI", *args: Any, **kwargs: Any) -> None:
         self.gui = gui
-        super(CompFrame, self).__init__(*args, **kwargs)
+        super().__init__(*args, **kwargs)
 
         self.grid_columnconfigure(2, weight=1)
 
@@ -102,7 +102,7 @@ def __init__(self, gui: "GUI", *args: Any, **kwargs: Any) -> None:
         self.cb_comp_apply_preset()
         self.cb_no_compress()
 
-    def cb_comp_apply_preset(self, *args: Any) -> None:
+    def cb_comp_apply_preset(self, *_: Any) -> None:
         selection = self.gui.get_preset()
         if selection == "auto":
             if self.gui.get_input_name() == "local":
@@ -181,10 +181,10 @@ def cb_comp_apply_preset(self, *args: Any) -> None:
         self.cb_no_compress()
         self.gui.highlight_fields()
 
-    def cb_compress_advanced(self, *args: Any) -> None:
+    def cb_compress_advanced(self, *_: Any) -> None:
         AdvancedCompressionWindow(self.gui)
 
-    def cb_no_compress(self, *args: Any) -> None:
+    def cb_no_compress(self, *_: Any) -> None:
         if self.gui.no_compress_var.get() is True:
             state = "disabled"
         else:
diff --git a/src/sticker_convert/gui_components/frames/config_frame.py b/src/sticker_convert/gui_components/frames/config_frame.py
index b1e7f0fd..05d25ff4 100644
--- a/src/sticker_convert/gui_components/frames/config_frame.py
+++ b/src/sticker_convert/gui_components/frames/config_frame.py
@@ -5,17 +5,17 @@
 
 from ttkbootstrap import Button, Checkbutton, Label, LabelFrame  # type: ignore
 
-if TYPE_CHECKING:
-    from sticker_convert.gui import GUI  # type: ignore
-
 from sticker_convert.definitions import CONFIG_DIR
 from sticker_convert.utils.files.run_bin import RunBin
 
+if TYPE_CHECKING:
+    from sticker_convert.gui import GUI  # type: ignore
+
 
 class ConfigFrame(LabelFrame):
     def __init__(self, gui: "GUI", *args: Any, **kwargs: Any) -> None:
         self.gui = gui
-        super(ConfigFrame, self).__init__(*args, **kwargs)
+        super().__init__(*args, **kwargs)
 
         self.grid_columnconfigure(1, weight=1)
         self.grid_columnconfigure(3, weight=1)
@@ -77,7 +77,7 @@ def __init__(self, gui: "GUI", *args: Any, **kwargs: Any) -> None:
             column=3, row=1, sticky="w", padx=3, pady=3
         )
 
-    def cb_clear_cred(self, *args: Any, **kwargs: Any) -> None:
+    def cb_clear_cred(self, *_: Any, **kwargs: Any) -> None:
         response = self.gui.cb_ask_bool("Are you sure you want to clear credentials?")
         if response is True:
             self.gui.delete_creds()
@@ -86,7 +86,7 @@ def cb_clear_cred(self, *args: Any, **kwargs: Any) -> None:
             self.gui.highlight_fields()
             self.gui.cb_msg_block("Credentials cleared.")
 
-    def cb_restore_default(self, *args: Any, **kwargs: Any) -> None:
+    def cb_restore_default(self, *_: Any, **kwargs: Any) -> None:
         response = self.gui.cb_ask_bool(
             "Are you sure you want to restore default config? (This will not clear credentials.)"
         )
@@ -97,7 +97,7 @@ def cb_restore_default(self, *args: Any, **kwargs: Any) -> None:
             self.gui.highlight_fields()
             self.gui.cb_msg_block("Restored to default config.")
 
-    def cb_open_config_directory(self, *args: Any, **kwargs: Any) -> None:
+    def cb_open_config_directory(self, *_: Any, **kwargs: Any) -> None:
         self.gui.cb_msg(msg=f"Config is located at {CONFIG_DIR}")
         if platform.system() == "Windows":
             os.startfile(CONFIG_DIR)  # type: ignore
diff --git a/src/sticker_convert/gui_components/frames/control_frame.py b/src/sticker_convert/gui_components/frames/control_frame.py
index 664fe263..5b0258a1 100644
--- a/src/sticker_convert/gui_components/frames/control_frame.py
+++ b/src/sticker_convert/gui_components/frames/control_frame.py
@@ -10,7 +10,7 @@
 class ControlFrame(Frame):
     def __init__(self, gui: "GUI", *args: Any, **kwargs: Any) -> None:
         self.gui = gui
-        super(ControlFrame, self).__init__(*args, **kwargs)
+        super().__init__(*args, **kwargs)
 
         self.start_btn = Button(
             self,
diff --git a/src/sticker_convert/gui_components/frames/cred_frame.py b/src/sticker_convert/gui_components/frames/cred_frame.py
index 09e45420..8430c96c 100644
--- a/src/sticker_convert/gui_components/frames/cred_frame.py
+++ b/src/sticker_convert/gui_components/frames/cred_frame.py
@@ -4,19 +4,19 @@
 
 from ttkbootstrap import Button, Entry, Label, LabelFrame  # type: ignore
 
-if TYPE_CHECKING:
-    from sticker_convert.gui import GUI  # type: ignore
-
 from sticker_convert.gui_components.frames.right_clicker import RightClicker
 from sticker_convert.gui_components.windows.kakao_get_auth_window import KakaoGetAuthWindow
 from sticker_convert.gui_components.windows.line_get_auth_window import LineGetAuthWindow
 from sticker_convert.gui_components.windows.signal_get_auth_window import SignalGetAuthWindow
 
+if TYPE_CHECKING:
+    from sticker_convert.gui import GUI  # type: ignore
+
 
 class CredFrame(LabelFrame):
     def __init__(self, gui: "GUI", *args: Any, **kwargs: Any) -> None:
         self.gui = gui
-        super(CredFrame, self).__init__(*args, **kwargs)
+        super().__init__(*args, **kwargs)
 
         self.grid_columnconfigure(1, weight=1)
 
@@ -135,19 +135,19 @@ def __init__(self, gui: "GUI", *args: Any, **kwargs: Any) -> None:
         self.line_get_auth_btn.grid(column=2, row=6, sticky="e", padx=3, pady=3)
         self.help_btn.grid(column=2, row=8, sticky="e", padx=3, pady=3)
 
-    def cb_cred_help(self, *args: Any) -> None:
+    def cb_cred_help(self, *_: Any) -> None:
         faq_site = "https://github.com/laggykiller/sticker-convert#faq"
         success = webbrowser.open(faq_site)
         if not success:
             self.gui.cb_ask_str("You can get help from:", initialvalue=faq_site)
 
-    def cb_kakao_get_auth(self, *args: Any) -> None:
+    def cb_kakao_get_auth(self, *_: Any) -> None:
         KakaoGetAuthWindow(self.gui)
 
-    def cb_signal_get_auth(self, *args: Any) -> None:
+    def cb_signal_get_auth(self, *_: Any) -> None:
         SignalGetAuthWindow(self.gui)
 
-    def cb_line_get_auth(self, *args: Any) -> None:
+    def cb_line_get_auth(self, *_: Any) -> None:
         LineGetAuthWindow(self.gui)
 
     def set_states(self, state: str) -> None:
diff --git a/src/sticker_convert/gui_components/frames/input_frame.py b/src/sticker_convert/gui_components/frames/input_frame.py
index 0fad9025..ab035a6b 100644
--- a/src/sticker_convert/gui_components/frames/input_frame.py
+++ b/src/sticker_convert/gui_components/frames/input_frame.py
@@ -5,18 +5,18 @@
 
 from ttkbootstrap import Button, Entry, Label, LabelFrame, OptionMenu  # type: ignore
 
-if TYPE_CHECKING:
-    from sticker_convert.gui import GUI  # type: ignore
-
 from sticker_convert.definitions import DEFAULT_DIR
 from sticker_convert.gui_components.frames.right_clicker import RightClicker
 from sticker_convert.utils.url_detect import UrlDetect
 
+if TYPE_CHECKING:
+    from sticker_convert.gui import GUI  # type: ignore
+
 
 class InputFrame(LabelFrame):
     def __init__(self, gui: "GUI", *args: Any, **kwargs: Any) -> None:
         self.gui = gui
-        super(InputFrame, self).__init__(*args, **kwargs)
+        super().__init__(*args, **kwargs)
 
         self.input_option_lbl = Label(
             self, text="Input source", width=15, justify="left", anchor="w"
@@ -100,7 +100,7 @@ def __init__(self, gui: "GUI", *args: Any, **kwargs: Any) -> None:
         else:
             self.address_entry.config(state="normal")
 
-    def cb_set_indir(self, *args: Any) -> None:
+    def cb_set_indir(self, *_args: Any) -> None:
         orig_input_dir = self.gui.input_setdir_var.get()
         if not Path(orig_input_dir).is_dir():
             orig_input_dir = DEFAULT_DIR
@@ -108,7 +108,7 @@ def cb_set_indir(self, *args: Any) -> None:
         if input_dir:
             self.gui.input_setdir_var.set(input_dir)
 
-    def cb_input_option(self, *args: Any) -> bool:
+    def cb_input_option(self, *_: Any) -> bool:
         input_option_display = self.gui.get_input_display_name()
 
         if input_option_display == "auto":
diff --git a/src/sticker_convert/gui_components/frames/output_frame.py b/src/sticker_convert/gui_components/frames/output_frame.py
index dff943c9..e3d0f170 100644
--- a/src/sticker_convert/gui_components/frames/output_frame.py
+++ b/src/sticker_convert/gui_components/frames/output_frame.py
@@ -5,17 +5,17 @@
 
 from ttkbootstrap import Button, Entry, Label, LabelFrame, OptionMenu  # type: ignore
 
-if TYPE_CHECKING:
-    from sticker_convert.gui import GUI  # type: ignore
-
 from sticker_convert.definitions import DEFAULT_DIR
 from sticker_convert.gui_components.frames.right_clicker import RightClicker
 
+if TYPE_CHECKING:
+    from sticker_convert.gui import GUI  # type: ignore
+
 
 class OutputFrame(LabelFrame):
     def __init__(self, gui: "GUI", *args: Any, **kwargs: Any) -> None:
         self.gui = gui
-        super(OutputFrame, self).__init__(*args, **kwargs)
+        super().__init__(*args, **kwargs)
 
         self.output_option_lbl = Label(
             self, text="Output options", width=18, justify="left", anchor="w"
@@ -89,7 +89,7 @@ def __init__(self, gui: "GUI", *args: Any, **kwargs: Any) -> None:
             column=1, columnspan=2, row=3, sticky="w", padx=3, pady=3
         )
 
-    def cb_set_outdir(self, *args: Any) -> None:
+    def cb_set_outdir(self, *_args: Any) -> None:
         orig_output_dir = self.gui.output_setdir_var.get()
         if not Path(orig_output_dir).is_dir():
             orig_output_dir = DEFAULT_DIR
@@ -97,7 +97,7 @@ def cb_set_outdir(self, *args: Any) -> None:
         if output_dir:
             self.gui.output_setdir_var.set(output_dir)
 
-    def cb_output_option(self, *args: Any) -> None:
+    def cb_output_option(self, *_: Any) -> None:
         self.gui.output_option_true_var.set(self.gui.output_option_display_var.get())
         self.gui.comp_frame.cb_comp_apply_preset()
         self.gui.highlight_fields()
diff --git a/src/sticker_convert/gui_components/frames/progress_frame.py b/src/sticker_convert/gui_components/frames/progress_frame.py
index 32f76617..6cd17b3d 100644
--- a/src/sticker_convert/gui_components/frames/progress_frame.py
+++ b/src/sticker_convert/gui_components/frames/progress_frame.py
@@ -5,11 +5,11 @@
 from ttkbootstrap import LabelFrame, Progressbar  # type: ignore
 from ttkbootstrap.scrolled import ScrolledText  # type: ignore
 
+from sticker_convert.gui_components.frames.right_clicker import RightClicker
+
 if TYPE_CHECKING:
     from sticker_convert.gui import GUI  # type: ignore
 
-from sticker_convert.gui_components.frames.right_clicker import RightClicker
-
 
 class ProgressFrame(LabelFrame):
     progress_bar_cli = None
@@ -18,7 +18,7 @@ class ProgressFrame(LabelFrame):
 
     def __init__(self, gui: "GUI", *args: Any, **kwargs: Any) -> None:
         self.gui = gui
-        super(ProgressFrame, self).__init__(*args, **kwargs)  # type: ignore
+        super().__init__(*args, **kwargs)  # type: ignore
 
         self.message_box = ScrolledText(self, height=15, wrap="word")
         self.message_box._text.bind("<Button-3><ButtonRelease-3>", RightClicker)  # type: ignore
@@ -90,8 +90,8 @@ def update_message_box(self, *args: Any, **kwargs: Any) -> None:
 
         self.message_box._text.config(state="disabled")  # type: ignore
 
-    def cb_disable_autoscroll(self, *args: Any) -> None:
+    def cb_disable_autoscroll(self, *_: Any) -> None:
         self.auto_scroll = False
 
-    def cb_enable_autoscroll(self, *args: Any) -> None:
+    def cb_enable_autoscroll(self, *_: Any) -> None:
         self.auto_scroll = True
diff --git a/src/sticker_convert/gui_components/gui_utils.py b/src/sticker_convert/gui_components/gui_utils.py
index 319c8169..93e2fecc 100644
--- a/src/sticker_convert/gui_components/gui_utils.py
+++ b/src/sticker_convert/gui_components/gui_utils.py
@@ -80,10 +80,8 @@ def finalize_window(window: Union["GUI", "BaseWindow"]) -> None:
         window_width = frame_width + window.y_scrollbar.winfo_width()
         window_height = frame_height + window.x_scrollbar.winfo_height()
 
-        if window_width > screen_width:
-            window_width = screen_width
-        if window_height > screen_height:
-            window_height = screen_height
+        window_width = min(window_width, screen_width)
+        window_height = min(window_height, screen_height)
 
         frame_width = window_width - window.y_scrollbar.winfo_width()
         frame_height = window_height - window.x_scrollbar.winfo_height()
diff --git a/src/sticker_convert/gui_components/windows/advanced_compression_window.py b/src/sticker_convert/gui_components/windows/advanced_compression_window.py
index 69f7465e..37fd0cd7 100644
--- a/src/sticker_convert/gui_components/windows/advanced_compression_window.py
+++ b/src/sticker_convert/gui_components/windows/advanced_compression_window.py
@@ -18,7 +18,7 @@ class AdvancedCompressionWindow(BaseWindow):
     emoji_btns: List[Tuple[Button, ImageTk.PhotoImage]] = []
 
     def __init__(self, *args: Any, **kwargs: Any) -> None:
-        super(AdvancedCompressionWindow, self).__init__(*args, **kwargs)
+        super().__init__(*args, **kwargs)
         self.categories = list({entry["category"] for entry in self.gui.emoji_list})
 
         self.title("Advanced compression options")
@@ -559,7 +559,7 @@ def __init__(self, *args: Any, **kwargs: Any) -> None:
 
         GUIUtils.finalize_window(self)
 
-    def cb_disable_fps(self, *args: Any) -> None:
+    def cb_disable_fps(self, *_: Any) -> None:
         if self.gui.fps_disable_var.get() is True:
             state = "disabled"
         else:
@@ -568,7 +568,7 @@ def cb_disable_fps(self, *args: Any) -> None:
         self.fps_min_entry.config(state=state)
         self.fps_max_entry.config(state=state)
 
-    def cb_disable_res_w(self, *args: Any) -> None:
+    def cb_disable_res_w(self, *_: Any) -> None:
         if self.gui.res_w_disable_var.get() is True:
             state = "disabled"
         else:
@@ -577,7 +577,7 @@ def cb_disable_res_w(self, *args: Any) -> None:
         self.res_w_min_entry.config(state=state)
         self.res_w_max_entry.config(state=state)
 
-    def cb_disable_res_h(self, *args: Any) -> None:
+    def cb_disable_res_h(self, *_: Any) -> None:
         if self.gui.res_h_disable_var.get() is True:
             state = "disabled"
         else:
@@ -586,7 +586,7 @@ def cb_disable_res_h(self, *args: Any) -> None:
         self.res_h_min_entry.config(state=state)
         self.res_h_max_entry.config(state=state)
 
-    def cb_disable_quality(self, *args: Any) -> None:
+    def cb_disable_quality(self, *_: Any) -> None:
         if self.gui.quality_disable_var.get() is True:
             state = "disabled"
         else:
@@ -595,7 +595,7 @@ def cb_disable_quality(self, *args: Any) -> None:
         self.quality_min_entry.config(state=state)
         self.quality_max_entry.config(state=state)
 
-    def cb_disable_color(self, *args: Any) -> None:
+    def cb_disable_color(self, *_: Any) -> None:
         if self.gui.color_disable_var.get() is True:
             state = "disabled"
         else:
@@ -604,7 +604,7 @@ def cb_disable_color(self, *args: Any) -> None:
         self.color_min_entry.config(state=state)
         self.color_max_entry.config(state=state)
 
-    def cb_disable_duration(self, *args: Any) -> None:
+    def cb_disable_duration(self, *_: Any) -> None:
         if (
             self.gui.duration_disable_var.get() is True
             or self.gui.comp_preset_var.get() == "auto"
@@ -616,7 +616,7 @@ def cb_disable_duration(self, *args: Any) -> None:
         self.duration_min_entry.config(state=state)
         self.duration_max_entry.config(state=state)
 
-    def cb_disable_size(self, *args: Any) -> None:
+    def cb_disable_size(self, *_: Any) -> None:
         if (
             self.gui.size_disable_var.get() is True
             or self.gui.comp_preset_var.get() == "auto"
@@ -628,7 +628,7 @@ def cb_disable_size(self, *args: Any) -> None:
         self.img_size_max_entry.config(state=state)
         self.vid_size_max_entry.config(state=state)
 
-    def cb_disable_format(self, *args: Any) -> None:
+    def cb_disable_format(self, *_: Any) -> None:
         if self.gui.comp_preset_var.get() == "auto":
             state = "disabled"
         else:
@@ -637,7 +637,7 @@ def cb_disable_format(self, *args: Any) -> None:
         self.img_format_entry.config(state=state)
         self.vid_format_entry.config(state=state)
 
-    def cb_disable_fake_vid(self, *args: Any) -> None:
+    def cb_disable_fake_vid(self, *_: Any) -> None:
         if self.gui.comp_preset_var.get() == "auto":
             state = "disabled"
         else:
@@ -657,7 +657,7 @@ def set_emoji_btn(self) -> None:
         self.ph_im = ImageTk.PhotoImage(self.im)
         self.default_emoji_dsp.config(image=self.ph_im)
 
-    def render_emoji_list(self, *args: Any) -> None:
+    def render_emoji_list(self, *_: Any) -> None:
         category = self.categories_var.get()
 
         for emoji_btn, ph_im in self.emoji_btns:
diff --git a/src/sticker_convert/gui_components/windows/base_window.py b/src/sticker_convert/gui_components/windows/base_window.py
index 7cf1b67b..7986d629 100644
--- a/src/sticker_convert/gui_components/windows/base_window.py
+++ b/src/sticker_convert/gui_components/windows/base_window.py
@@ -4,15 +4,15 @@
 
 from ttkbootstrap import Toplevel  # type: ignore
 
+from sticker_convert.gui_components.gui_utils import GUIUtils
+
 if TYPE_CHECKING:
     from sticker_convert.gui import GUI  # type: ignore
 
-from sticker_convert.gui_components.gui_utils import GUIUtils
-
 
 class BaseWindow(Toplevel):
     def __init__(self, gui: "GUI") -> None:
-        super(BaseWindow, self).__init__(alpha=0)  # type: ignore
+        super().__init__(alpha=0)  # type: ignore
         self.gui = gui
 
         GUIUtils.set_icon(self)
diff --git a/src/sticker_convert/gui_components/windows/kakao_get_auth_window.py b/src/sticker_convert/gui_components/windows/kakao_get_auth_window.py
index 6057ac61..64019259 100644
--- a/src/sticker_convert/gui_components/windows/kakao_get_auth_window.py
+++ b/src/sticker_convert/gui_components/windows/kakao_get_auth_window.py
@@ -13,7 +13,7 @@
 
 class KakaoGetAuthWindow(BaseWindow):
     def __init__(self, *args: Any, **kwargs: Any) -> None:
-        super(KakaoGetAuthWindow, self).__init__(*args, **kwargs)
+        super().__init__(*args, **kwargs)
 
         self.title("Get Kakao auth_token")
 
@@ -162,7 +162,7 @@ def __init__(self, *args: Any, **kwargs: Any) -> None:
     def cb_login(self) -> None:
         Thread(target=self.cb_login_thread, daemon=True).start()
 
-    def cb_login_thread(self, *args: Any) -> None:
+    def cb_login_thread(self, *_: Any) -> None:
         self.gui.save_creds()
         m = GetKakaoAuth(
             opt_cred=self.gui.get_opt_cred(),
diff --git a/src/sticker_convert/gui_components/windows/line_get_auth_window.py b/src/sticker_convert/gui_components/windows/line_get_auth_window.py
index 18e1ec7b..3f825453 100644
--- a/src/sticker_convert/gui_components/windows/line_get_auth_window.py
+++ b/src/sticker_convert/gui_components/windows/line_get_auth_window.py
@@ -13,7 +13,7 @@
 
 class LineGetAuthWindow(BaseWindow):
     def __init__(self, *args: Any, **kwargs: Any) -> None:
-        super(LineGetAuthWindow, self).__init__(*args, **kwargs)
+        super().__init__(*args, **kwargs)
 
         self.title("Get Line cookie")
 
@@ -80,7 +80,7 @@ def cb_open_browser(self) -> None:
     def cb_get_cookies(self) -> None:
         Thread(target=self.cb_get_cookies_thread, daemon=True).start()
 
-    def cb_get_cookies_thread(self, *args: Any) -> None:
+    def cb_get_cookies_thread(self, *_: Any) -> None:
         m = GetLineAuth()
 
         line_cookies = None
diff --git a/src/sticker_convert/gui_components/windows/signal_get_auth_window.py b/src/sticker_convert/gui_components/windows/signal_get_auth_window.py
index cf126dd0..62733b44 100644
--- a/src/sticker_convert/gui_components/windows/signal_get_auth_window.py
+++ b/src/sticker_convert/gui_components/windows/signal_get_auth_window.py
@@ -14,7 +14,7 @@
 
 class SignalGetAuthWindow(BaseWindow):
     def __init__(self, *args: Any, **kwargs: Any) -> None:
-        super(SignalGetAuthWindow, self).__init__(*args, **kwargs)
+        super().__init__(*args, **kwargs)
 
         self.title("Get Signal uuid and password")
 
diff --git a/src/sticker_convert/job.py b/src/sticker_convert/job.py
index 1e1533e5..da16fc24 100755
--- a/src/sticker_convert/job.py
+++ b/src/sticker_convert/job.py
@@ -94,13 +94,13 @@ def cb_thread(
                 else:
                     args = tuple()
                 if len(i) >= 3:
-                    kwargs: Dict[str, str] = i[2] if i[2] else dict()
+                    kwargs: Dict[str, str] = i[2] if i[2] else {}
                 else:
-                    kwargs = dict()
+                    kwargs = {}
             else:
                 action = i
                 args = tuple()
-                kwargs = dict()
+                kwargs = {}
             if action == "msg":
                 self.cb_msg(*args, **kwargs)
             elif action == "bar":
@@ -186,7 +186,7 @@ def join_workers(self) -> None:
 
         self.processes.clear()
 
-    def kill_workers(self, *args: Any, **kwargs: Any) -> None:
+    def kill_workers(self, *_: Any, **__: Any) -> None:
         self.is_cancel_job.value = 1  # type: ignore
         while not self.work_queue.empty():
             self.work_queue.get()
@@ -206,8 +206,7 @@ def cleanup(self) -> None:
 
     def get_result(self) -> Generator[Any, None, None]:
         gen: Iterator[Any] = iter(self.results_queue.get, None)
-        for result in gen:
-            yield result
+        yield from gen
 
     def cb(
         self,
@@ -279,7 +278,7 @@ def start(self) -> int:
                 code = 2
                 self.executor.cb("Job cancelled.")
                 break
-            elif not success:
+            if not success:
                 code = 1
                 self.executor.cb("An error occured during this run.")
                 break
@@ -289,7 +288,7 @@ def start(self) -> int:
 
         return code
 
-    def cancel(self, *args: Any, **kwargs: Any) -> None:
+    def cancel(self, *_: Any, **_kwargs: Any) -> None:
         self.executor.kill_workers()
 
     def verify_input(self) -> bool:
@@ -450,7 +449,7 @@ def verify_input(self) -> bool:
                 or not any(path.iterdir())
             ):
                 continue
-            elif path_type == "Output" and (
+            if path_type == "Output" and (
                 path.name == "stickers_output"
                 or self.opt_comp.no_compress
                 or not any(path.iterdir())
@@ -458,7 +457,7 @@ def verify_input(self) -> bool:
                 continue
 
             related_files = MetadataHandler.get_files_related_to_sticker_convert(path)
-            if any([i for i in path.iterdir() if i not in related_files]):
+            if any(i for i in path.iterdir() if i not in related_files):
                 msg = "WARNING: {} directory is set to {}.\n"
                 msg += 'It does not have default name of "{}",\n'
                 msg += "and It seems like it contains PERSONAL DATA.\n"
@@ -611,9 +610,7 @@ def compress(self) -> bool:
 
             if not in_f.is_file():
                 continue
-            elif (
-                CodecInfo.get_file_ext(i) in (".txt", ".m4a") or Path(i).stem == "cover"
-            ):
+            if CodecInfo.get_file_ext(i) in (".txt", ".m4a") or Path(i).stem == "cover":
                 shutil.copy(in_f, output_dir / i.name)
             else:
                 in_fs.append(i)
@@ -682,7 +679,9 @@ def export(self) -> bool:
             self.out_urls.extend(result)
 
         if self.out_urls:
-            with open(Path(self.opt_output.dir, "export-result.txt"), "w+") as f:
+            with open(
+                Path(self.opt_output.dir, "export-result.txt"), "w+", encoding="utf-8"
+            ) as f:
                 f.write("\n".join(self.out_urls))
         else:
             self.executor.cb("An error occured while exporting stickers")
@@ -696,14 +695,14 @@ def report(self) -> bool:
         msg += "##########\n"
         msg += "\n"
 
-        if self.compress_fails != []:
+        if self.compress_fails:
             msg += f'Warning: Could not compress the following {len(self.compress_fails)} file{"s" if len(self.compress_fails) > 1 else ""}:\n'
             msg += "\n".join(self.compress_fails)
             msg += "\n"
             msg += "\nConsider adjusting compression parameters"
             msg += "\n"
 
-        if self.out_urls != []:
+        if self.out_urls:
             msg += "Export results:\n"
             msg += "\n".join(self.out_urls)
         else:
diff --git a/src/sticker_convert/job_option.py b/src/sticker_convert/job_option.py
index 7cfd06f6..7ff09583 100755
--- a/src/sticker_convert/job_option.py
+++ b/src/sticker_convert/job_option.py
@@ -24,7 +24,7 @@ def __repr__(self) -> str:
         return json.dumps(self.to_dict(), indent=2)
 
     def to_dict(self) -> Dict[str, str]:
-        return dict()
+        return {}
 
 
 @dataclass
diff --git a/src/sticker_convert/uploaders/compress_wastickers.py b/src/sticker_convert/uploaders/compress_wastickers.py
index ba47e3da..cbf2f99e 100755
--- a/src/sticker_convert/uploaders/compress_wastickers.py
+++ b/src/sticker_convert/uploaders/compress_wastickers.py
@@ -19,7 +19,7 @@
 
 class CompressWastickers(UploadBase):
     def __init__(self, *args: Any, **kwargs: Any) -> None:
-        super(CompressWastickers, self).__init__(*args, **kwargs)
+        super().__init__(*args, **kwargs)
         self.base_spec.size_max_img = 100000
         self.base_spec.size_max_vid = 500000
         self.base_spec.duration_min = 8
diff --git a/src/sticker_convert/uploaders/upload_signal.py b/src/sticker_convert/uploaders/upload_signal.py
index 1ba70d5a..e91602c5 100755
--- a/src/sticker_convert/uploaders/upload_signal.py
+++ b/src/sticker_convert/uploaders/upload_signal.py
@@ -20,7 +20,7 @@
 
 class UploadSignal(UploadBase):
     def __init__(self, *args: Any, **kwargs: Any) -> None:
-        super(UploadSignal, self).__init__(*args, **kwargs)
+        super().__init__(*args, **kwargs)
 
         self.base_spec.set_size_max(300000)
         self.base_spec.set_res_max(512)
@@ -117,7 +117,7 @@ def upload_stickers_signal(self) -> List[str]:
             msg_block += f"Default emoji is set to {self.opt_comp.default_emoji}.\n"
             msg_block += "Please edit emoji.txt now, then continue"
             MetadataHandler.generate_emoji_file(
-                dir=self.opt_output.dir, default_emoji=self.opt_comp.default_emoji
+                directory=self.opt_output.dir, default_emoji=self.opt_comp.default_emoji
             )
 
             self.cb.put(("msg_block", (msg_block,), None))
diff --git a/src/sticker_convert/uploaders/upload_telegram.py b/src/sticker_convert/uploaders/upload_telegram.py
index 823bbf17..b9b220c7 100755
--- a/src/sticker_convert/uploaders/upload_telegram.py
+++ b/src/sticker_convert/uploaders/upload_telegram.py
@@ -19,7 +19,7 @@
 
 class UploadTelegram(UploadBase):
     def __init__(self, *args: Any, **kwargs: Any) -> None:
-        super(UploadTelegram, self).__init__(*args, **kwargs)
+        super().__init__(*args, **kwargs)
 
         self.base_spec.size_max_img = 512000
         self.base_spec.size_max_vid = 256000
@@ -209,6 +209,7 @@ async def upload_pack(
                         Path(f"bytes{ext}"),  # type: ignore
                         self.opt_comp_cover_merged,
                         self.cb,
+                        self.cb_return,
                     )
 
                 try:
@@ -248,7 +249,7 @@ def upload_stickers_telegram(self) -> List[str]:
             msg_block += f"Default emoji is set to {self.opt_comp.default_emoji}.\n"
             msg_block += "Please edit emoji.txt now, then continue"
             MetadataHandler.generate_emoji_file(
-                dir=self.opt_output.dir, default_emoji=self.opt_comp.default_emoji
+                directory=self.opt_output.dir, default_emoji=self.opt_comp.default_emoji
             )
 
             self.cb.put(("msg_block", (msg_block,), None))
diff --git a/src/sticker_convert/uploaders/xcode_imessage.py b/src/sticker_convert/uploaders/xcode_imessage.py
index 0fb34589..df7b5e7f 100755
--- a/src/sticker_convert/uploaders/xcode_imessage.py
+++ b/src/sticker_convert/uploaders/xcode_imessage.py
@@ -14,31 +14,15 @@
 from sticker_convert.job_option import CompOption, CredOption, OutputOption
 from sticker_convert.uploaders.upload_base import UploadBase
 from sticker_convert.utils.callback import Callback, CallbackReturn
-from sticker_convert.utils.files.metadata_handler import MetadataHandler
+from sticker_convert.utils.files.metadata_handler import XCODE_IMESSAGE_ICONSET, MetadataHandler
 from sticker_convert.utils.files.sanitize_filename import sanitize_filename
 from sticker_convert.utils.media.codec_info import CodecInfo
 from sticker_convert.utils.media.format_verify import FormatVerify
 
-XCODE_IMESSAGE_ICONSET = {
-    "App-Store-1024x1024pt.png": (1024, 1024),
-    "iPad-Settings-29pt@2x.png": (58, 58),
-    "iPhone-settings-29pt@2x.png": (58, 58),
-    "iPhone-settings-29pt@3x.png": (87, 87),
-    "Messages27x20pt@2x.png": (54, 40),
-    "Messages27x20pt@3x.png": (81, 60),
-    "Messages32x24pt@2x.png": (64, 48),
-    "Messages32x24pt@3x.png": (96, 72),
-    "Messages-App-Store-1024x768pt.png": (1024, 768),
-    "Messages-iPad-67x50pt@2x.png": (134, 100),
-    "Messages-iPad-Pro-74x55pt@2x.png": (148, 110),
-    "Messages-iPhone-60x45pt@2x.png": (120, 90),
-    "Messages-iPhone-60x45pt@3x.png": (180, 135),
-}
-
 
 class XcodeImessage(UploadBase):
     def __init__(self, *args: Any, **kwargs: Any) -> None:
-        super(XcodeImessage, self).__init__(*args, **kwargs)
+        super().__init__(*args, **kwargs)
         self.base_spec.set_size_max(500000)
         self.base_spec.set_res(300)
         self.base_spec.set_format(("png", ".apng", ".gif", ".jpeg", "jpg"))
@@ -137,9 +121,9 @@ def add_metadata(self, author: str, title: str) -> None:
             spec_cover.set_fps(0)
 
             icon_path = self.opt_output.dir / icon
-            if Path(icon) in [
-                i for i in self.opt_output.dir.iterdir()
-            ] and not FormatVerify.check_file(icon_path, spec=spec_cover):
+            if Path(icon) in list(
+                self.opt_output.dir.iterdir()
+            ) and not FormatVerify.check_file(icon_path, spec=spec_cover):
                 StickerConvert.convert(
                     icon_path, icon_path, spec_cover, self.cb, self.cb_return
                 )
@@ -244,18 +228,18 @@ def create_xcode_proj(self, author: str, title: str) -> None:
                 }
 
                 # packname StickerPackExtension/Stickers.xcstickers/Sticker Pack.stickerpack/0.sticker/Contents.json
-                with open(sticker_path / "Contents.json", "w+") as f:
+                with open(sticker_path / "Contents.json", "w+", encoding="utf-8") as f:
                     json.dump(sticker_json_content, f, indent=2)
 
         # packname StickerPackExtension/Stickers.xcstickers/Sticker Pack.stickerpack/Contents.json
-        with open(stickers_path / "Contents.json") as f:
+        with open(stickers_path / "Contents.json", encoding="utf-8") as f:
             stickerpack_json_content: Dict[str, List[Dict[str, str]]] = json.load(f)
 
         stickerpack_json_content["stickers"] = []
         for sticker in stickers_lst:
             stickerpack_json_content["stickers"].append({"filename": sticker})
 
-        with open(stickers_path / "Contents.json", "w+") as f:
+        with open(stickers_path / "Contents.json", "w+", encoding="utf-8") as f:
             json.dump(stickerpack_json_content, f, indent=2)
 
         # packname StickerPackExtension/Stickers.xcstickers/iMessage App Icon.stickersiconset
diff --git a/src/sticker_convert/utils/auth/get_kakao_auth.py b/src/sticker_convert/utils/auth/get_kakao_auth.py
index 5f4579c0..a472140c 100755
--- a/src/sticker_convert/utils/auth/get_kakao_auth.py
+++ b/src/sticker_convert/utils/auth/get_kakao_auth.py
@@ -117,13 +117,12 @@ def enter_phone(self) -> bool:
 
         if self.verify_method == "passcode":
             return self.verify_receive_sms()
-        elif self.verify_method == "mo-send":
+        if self.verify_method == "mo-send":
             dest_number = response_json["viewData"]["moNumber"]
             msg = response_json["viewData"]["moMessage"]
             return self.verify_send_sms(dest_number, msg)
-        else:
-            self.cb_msg_block(f"Unknown verification method: {response.text}")
-            return False
+        self.cb_msg_block(f"Unknown verification method: {response.text}")
+        return False
 
     def verify_send_sms(self, dest_number: str, msg: str) -> bool:
         self.cb_msg("Verification by sending SMS")
diff --git a/src/sticker_convert/utils/auth/get_line_auth.py b/src/sticker_convert/utils/auth/get_line_auth.py
index a362bff7..1eef0409 100755
--- a/src/sticker_convert/utils/auth/get_line_auth.py
+++ b/src/sticker_convert/utils/auth/get_line_auth.py
@@ -77,5 +77,4 @@ def validate_cookies(cookies: Union[CookieJar, Dict[str, str]]) -> bool:
 
         if response_dict["errorMessage"]:
             return False
-        else:
-            return True
+        return True
diff --git a/src/sticker_convert/utils/auth/get_signal_auth.py b/src/sticker_convert/utils/auth/get_signal_auth.py
index 81d3484f..e0a94359 100755
--- a/src/sticker_convert/utils/auth/get_signal_auth.py
+++ b/src/sticker_convert/utils/auth/get_signal_auth.py
@@ -45,10 +45,10 @@ def get_signal_desktop(self) -> Tuple[Optional[str], Optional[str]]:
 
         if Path(signal_bin_path_prod).is_file():
             return signal_bin_path_prod, signal_user_data_dir_prod
-        elif Path(signal_bin_path_beta).is_file():
+        if Path(signal_bin_path_beta).is_file():
             return signal_bin_path_beta, signal_user_data_dir_beta
-        else:
-            return None, None
+
+        return None, None
 
     def get_cred(
         self,
@@ -76,7 +76,7 @@ def get_cred(
             msg += f"{signal_user_data_dir=}\n"
             return None, None, msg
 
-        with open(signal_config) as f:
+        with open(signal_config, encoding="utf-8") as f:
             config = json.load(f)
         key = config.get("key")
         db_key = f"x'{key}'"
diff --git a/src/sticker_convert/utils/callback.py b/src/sticker_convert/utils/callback.py
index 69f4aadf..74d4f5f3 100644
--- a/src/sticker_convert/utils/callback.py
+++ b/src/sticker_convert/utils/callback.py
@@ -122,16 +122,15 @@ def cb_ask_bool(self, *args: Any, **kwargs: Any) -> bool:
                 '"--no-confirm" flag is set. Continue with this run without asking questions'
             )
             return True
-        else:
-            self.msg(
-                '[If you do not want to get asked by this question, add "--no-confirm" flag]'
-            )
-            self.msg()
-            result = input("Continue? [y/N] > ")
-            if result.lower() != "y":
-                return False
-            else:
-                return True
+
+        self.msg(
+            '[If you do not want to get asked by this question, add "--no-confirm" flag]'
+        )
+        self.msg()
+        result = input("Continue? [y/N] > ")
+        if result.lower() != "y":
+            return False
+        return True
 
     def cb_ask_str(
         self,
@@ -166,18 +165,18 @@ def put(
             else:
                 args = tuple()
             if len(i) >= 3:
-                kwargs: Dict[str, Any] = i[2] if i[2] else dict()
+                kwargs: Dict[str, Any] = i[2] if i[2] else {}
             else:
-                kwargs = dict()
+                kwargs = {}
         else:
             action = i
             args = tuple()
-            kwargs = dict()
+            kwargs = {}
 
         # Fake implementation for Queue.put()
         if action is None:
             return None
-        elif action == "msg":
+        if action == "msg":
             self.msg(*args, **kwargs)
         elif action == "bar":
             self.bar(**kwargs)
diff --git a/src/sticker_convert/utils/files/cache_store.py b/src/sticker_convert/utils/files/cache_store.py
index 0cedcfa0..ee4c8ed6 100755
--- a/src/sticker_convert/utils/files/cache_store.py
+++ b/src/sticker_convert/utils/files/cache_store.py
@@ -2,7 +2,10 @@
 import os
 import platform
 import shutil
+from contextlib import contextmanager
 from pathlib import Path
+from tempfile import TemporaryDirectory
+from typing import Any, ContextManager, Generator, Optional, Union
 from uuid import uuid4
 
 if platform.system() == "Linux":
@@ -12,10 +15,6 @@
 else:
     import tempfile
 
-from contextlib import contextmanager
-from tempfile import TemporaryDirectory
-from typing import Any, ContextManager, Generator, Optional, Union
-
 
 def debug_cache_dir(path: str) -> ContextManager[Path]:
     @contextmanager
@@ -37,5 +36,4 @@ def get_cache_store(
     ) -> "Union[ContextManager[Path], TemporaryDirectory[str]]":
         if path:
             return debug_cache_dir(path)
-        else:
-            return tempfile.TemporaryDirectory()  # type: ignore
+        return tempfile.TemporaryDirectory()  # type: ignore
diff --git a/src/sticker_convert/utils/files/json_manager.py b/src/sticker_convert/utils/files/json_manager.py
index fdd3159a..e8363a1e 100755
--- a/src/sticker_convert/utils/files/json_manager.py
+++ b/src/sticker_convert/utils/files/json_manager.py
@@ -9,10 +9,9 @@ class JsonManager:
     def load_json(path: Path) -> Dict[Any, Any]:
         if not path.is_file():
             raise RuntimeError(f"{path} cannot be found")
-        else:
-            with open(path, encoding="utf-8") as f:
-                data = json.load(f)
-            return data
+        with open(path, encoding="utf-8") as f:
+            data = json.load(f)
+        return data
 
     @staticmethod
     def save_json(path: Path, data: Dict[Any, Any]) -> None:
diff --git a/src/sticker_convert/utils/files/metadata_handler.py b/src/sticker_convert/utils/files/metadata_handler.py
index 79c274bd..7ff5d380 100755
--- a/src/sticker_convert/utils/files/metadata_handler.py
+++ b/src/sticker_convert/utils/files/metadata_handler.py
@@ -38,6 +38,22 @@
 BLACKLIST_PREFIX = ("cover",)
 BLACKLIST_SUFFIX = (".txt", ".m4a", ".wastickers", ".DS_Store", "._.DS_Store")
 
+XCODE_IMESSAGE_ICONSET = {
+    "App-Store-1024x1024pt.png": (1024, 1024),
+    "iPad-Settings-29pt@2x.png": (58, 58),
+    "iPhone-settings-29pt@2x.png": (58, 58),
+    "iPhone-settings-29pt@3x.png": (87, 87),
+    "Messages27x20pt@2x.png": (54, 40),
+    "Messages27x20pt@3x.png": (81, 60),
+    "Messages32x24pt@2x.png": (64, 48),
+    "Messages32x24pt@3x.png": (96, 72),
+    "Messages-App-Store-1024x768pt.png": (1024, 768),
+    "Messages-iPad-67x50pt@2x.png": (134, 100),
+    "Messages-iPad-Pro-74x55pt@2x.png": (148, 110),
+    "Messages-iPhone-60x45pt@2x.png": (120, 90),
+    "Messages-iPhone-60x45pt@3x.png": (180, 135),
+}
+
 
 def check_if_xcodeproj(path: Path) -> bool:
     if not path.is_dir():
@@ -51,13 +67,11 @@ def check_if_xcodeproj(path: Path) -> bool:
 class MetadataHandler:
     @staticmethod
     def get_files_related_to_sticker_convert(
-        dir: Path, include_archive: bool = True
+        directory: Path, include_archive: bool = True
     ) -> List[Path]:
-        from sticker_convert.uploaders.xcode_imessage import XCODE_IMESSAGE_ICONSET
-
         files = [
             i
-            for i in sorted(dir.iterdir())
+            for i in sorted(directory.iterdir())
             if i.stem in RELATED_NAME
             or i.name in XCODE_IMESSAGE_ICONSET
             or i.suffix in RELATED_EXTENSIONS
@@ -68,13 +82,11 @@ def get_files_related_to_sticker_convert(
         return files
 
     @staticmethod
-    def get_stickers_present(dir: Path) -> List[Path]:
-        from sticker_convert.uploaders.xcode_imessage import XCODE_IMESSAGE_ICONSET
-
+    def get_stickers_present(directory: Path) -> List[Path]:
         stickers_present = [
             i
-            for i in sorted(dir.iterdir())
-            if Path(dir, i.name).is_file()
+            for i in sorted(directory.iterdir())
+            if Path(directory, i.name).is_file()
             and not i.name.startswith(BLACKLIST_PREFIX)
             and i.suffix not in BLACKLIST_SUFFIX
             and i.name not in XCODE_IMESSAGE_ICONSET
@@ -83,32 +95,32 @@ def get_stickers_present(dir: Path) -> List[Path]:
         return stickers_present
 
     @staticmethod
-    def get_cover(dir: Path) -> Optional[Path]:
-        stickers_present = sorted(dir.iterdir())
+    def get_cover(directory: Path) -> Optional[Path]:
+        stickers_present = sorted(directory.iterdir())
         for i in stickers_present:
             if Path(i).stem == "cover":
-                return Path(dir, i.name)
+                return Path(directory, i.name)
 
         return None
 
     @staticmethod
     def get_metadata(
-        dir: Path,
+        directory: Path,
         title: Optional[str] = None,
         author: Optional[str] = None,
         emoji_dict: Optional[Dict[str, str]] = None,
     ) -> Tuple[Optional[str], Optional[str], Optional[Dict[str, str]]]:
-        title_path = Path(dir, "title.txt")
+        title_path = Path(directory, "title.txt")
         if not title and title_path.is_file():
             with open(title_path, encoding="utf-8") as f:
                 title = f.read().strip()
 
-        author_path = Path(dir, "author.txt")
+        author_path = Path(directory, "author.txt")
         if not author and author_path.is_file():
             with open(author_path, encoding="utf-8") as f:
                 author = f.read().strip()
 
-        emoji_path = Path(dir, "emoji.txt")
+        emoji_path = Path(directory, "emoji.txt")
         if not emoji_dict and emoji_path.is_file():
             with open(emoji_path, "r", encoding="utf-8") as f:
                 emoji_dict = json.load(f)
@@ -117,22 +129,22 @@ def get_metadata(
 
     @staticmethod
     def set_metadata(
-        dir: Path,
+        directory: Path,
         title: Optional[str] = None,
         author: Optional[str] = None,
         emoji_dict: Optional[Dict[str, str]] = None,
     ):
-        title_path = Path(dir, "title.txt")
+        title_path = Path(directory, "title.txt")
         if title is not None:
             with open(title_path, "w+", encoding="utf-8") as f:
                 f.write(title)
 
-        author_path = Path(dir, "author.txt")
+        author_path = Path(directory, "author.txt")
         if author is not None:
             with open(author_path, "w+", encoding="utf-8") as f:
                 f.write(author)
 
-        emoji_path = Path(dir, "emoji.txt")
+        emoji_path = Path(directory, "emoji.txt")
         if emoji_dict is not None:
             with open(emoji_path, "w+", encoding="utf-8") as f:
                 json.dump(emoji_dict, f, indent=4, ensure_ascii=False)
@@ -155,7 +167,7 @@ def check_metadata_provided(
             metadata_provided = metadata_file_path.is_file()
             if metadata_provided:
                 with open(metadata_file_path, encoding="utf-8") as f:
-                    metadata_provided = True if f.read() else False
+                    metadata_provided = bool(f.read())
         else:
             metadata_provided = input_presets[input_option]["metadata_provides"][
                 metadata
@@ -171,16 +183,16 @@ def check_metadata_required(output_option: str, metadata: str) -> bool:
         return output_presets[output_option]["metadata_requirements"][metadata]
 
     @staticmethod
-    def generate_emoji_file(dir: Path, default_emoji: str = "") -> None:
-        emoji_path = Path(dir, "emoji.txt")
+    def generate_emoji_file(directory: Path, default_emoji: str = "") -> None:
+        emoji_path = Path(directory, "emoji.txt")
         emoji_dict = None
         if emoji_path.is_file():
             with open(emoji_path, "r", encoding="utf-8") as f:
                 emoji_dict = json.load(f)
 
         emoji_dict_new = {}
-        for file in sorted(dir.iterdir()):
-            if not Path(dir, file).is_file() and CodecInfo.get_file_ext(file) in (
+        for file in sorted(directory.iterdir()):
+            if not Path(directory, file).is_file() and CodecInfo.get_file_ext(file) in (
                 ".txt",
                 ".m4a",
             ):
@@ -196,7 +208,7 @@ def generate_emoji_file(dir: Path, default_emoji: str = "") -> None:
 
     @staticmethod
     def split_sticker_packs(
-        dir: Path,
+        directory: Path,
         title: str,
         file_per_pack: Optional[int] = None,
         file_per_anim_pack: Optional[int] = None,
@@ -216,7 +228,7 @@ def split_sticker_packs(
             file_per_anim_pack = file_per_pack
             file_per_image_pack = file_per_pack
 
-        stickers_present = MetadataHandler.get_stickers_present(dir)
+        stickers_present = MetadataHandler.get_stickers_present(directory)
 
         processed = 0
 
@@ -231,7 +243,7 @@ def split_sticker_packs(
             image_present = False
 
             for processed, file in enumerate(stickers_present):
-                file_path = dir / file
+                file_path = directory / file
 
                 if CodecInfo.is_anim(file_path):
                     anim_stickers.append(file_path)
@@ -241,7 +253,7 @@ def split_sticker_packs(
                 anim_present = anim_present or len(anim_stickers) > 0
                 image_present = image_present or len(image_stickers) > 0
 
-                finished_all = True if processed == len(stickers_present) - 1 else False
+                finished_all = processed == len(stickers_present) - 1
 
                 if len(anim_stickers) == file_per_anim_pack or (
                     finished_all and len(anim_stickers) > 0
@@ -265,11 +277,11 @@ def split_sticker_packs(
             pack_count = 0
 
             for processed, file in enumerate(stickers_present):
-                file_path = Path(dir, file)
+                file_path = Path(directory, file)
 
                 stickers.append(file_path)
 
-                finished_all = True if processed == len(stickers_present) - 1 else False
+                finished_all = processed == len(stickers_present) - 1
 
                 if len(stickers) == file_per_pack or (
                     finished_all and len(stickers) > 0
diff --git a/src/sticker_convert/utils/files/run_bin.py b/src/sticker_convert/utils/files/run_bin.py
index 8faab4d2..e7b6eaae 100755
--- a/src/sticker_convert/utils/files/run_bin.py
+++ b/src/sticker_convert/utils/files/run_bin.py
@@ -9,19 +9,19 @@
 class RunBin:
     @staticmethod
     def get_bin(
-        bin: str, silent: bool = False, cb_msg: Callable[..., Any] = print
+        executable: str, silent: bool = False, cb_msg: Callable[..., Any] = print
     ) -> Union[str, None]:
-        if Path(bin).is_file():
-            return bin
+        if Path(executable).is_file():
+            return executable
 
         if platform.system() == "Windows":
-            bin = bin + ".exe"
+            executable = executable + ".exe"
 
-        which_result = shutil.which(bin)
+        which_result = shutil.which(executable)
         if which_result is not None:
             return str(Path(which_result).resolve())
-        elif silent is False:
-            cb_msg(f"Warning: Cannot find binary file {bin}")
+        if silent is False:
+            cb_msg(f"Warning: Cannot find binary file {executable}")
 
         return None
 
@@ -46,6 +46,7 @@ def run_cmd(
             stdin=subprocess.PIPE,
             stdout=subprocess.PIPE,
             stderr=subprocess.PIPE,
+            check=False,
         )
 
         output_str = sp.stdout.decode()
diff --git a/src/sticker_convert/utils/files/sanitize_filename.py b/src/sticker_convert/utils/files/sanitize_filename.py
index 0e7ca487..c47a44ba 100755
--- a/src/sticker_convert/utils/files/sanitize_filename.py
+++ b/src/sticker_convert/utils/files/sanitize_filename.py
@@ -46,7 +46,7 @@ def sanitize_filename(filename: str) -> str:
     filename = unicodedata.normalize("NFKD", filename)
     filename = filename.rstrip(". ")  # Windows does not allow these at end
     filename = filename.strip()
-    if all([x == "." for x in filename]):
+    if all(x == "." for x in filename):
         filename = "__" + filename
     if filename in RESERVED_FILENAME:
         filename = "__" + filename
diff --git a/src/sticker_convert/utils/media/apple_png_normalize.py b/src/sticker_convert/utils/media/apple_png_normalize.py
index d3a7573c..a22ae593 100755
--- a/src/sticker_convert/utils/media/apple_png_normalize.py
+++ b/src/sticker_convert/utils/media/apple_png_normalize.py
@@ -56,8 +56,8 @@ def normalize(old_png: bytes) -> bytes:
 
                 assert width
                 assert height
-                bufSize = width * height * 4 + height
-                chunk_data = zlib.decompress(chunk_d, -8, bufSize)
+                buf_size = width * height * 4 + height
+                chunk_data = zlib.decompress(chunk_d, -8, buf_size)
 
                 # Swapping red & blue bytes for each pixel
                 chunk_data = bytearray(chunk_data)
diff --git a/src/sticker_convert/utils/media/codec_info.py b/src/sticker_convert/utils/media/codec_info.py
index 6c613334..d0d761e0 100755
--- a/src/sticker_convert/utils/media/codec_info.py
+++ b/src/sticker_convert/utils/media/codec_info.py
@@ -24,7 +24,7 @@ def __init__(
         )
         self.codec = CodecInfo.get_file_codec(file)
         self.res = CodecInfo.get_file_res(file)
-        self.is_animated = True if self.fps > 1 else False
+        self.is_animated = self.fps > 1
 
     @staticmethod
     def get_file_fps_frames_duration(
@@ -63,7 +63,7 @@ def get_file_fps(file: Union[Path, bytes], file_ext: Optional[str] = None) -> fl
 
         if file_ext == ".tgs":
             return CodecInfo._get_file_fps_tgs(file)
-        elif file_ext == ".webp":
+        if file_ext == ".webp":
             frames, duration = CodecInfo._get_file_frames_duration_webp(file)
         elif file_ext in (".gif", ".apng", ".png"):
             frames, duration = CodecInfo._get_file_frames_duration_pillow(file)
@@ -74,8 +74,7 @@ def get_file_fps(file: Union[Path, bytes], file_ext: Optional[str] = None) -> fl
 
         if duration > 0:
             return frames / duration * 1000
-        else:
-            return 0
+        return 0
 
     @staticmethod
     def get_file_frames(
@@ -89,7 +88,7 @@ def get_file_frames(
 
         if file_ext == ".tgs":
             return CodecInfo._get_file_frames_tgs(file)
-        elif file_ext in (".gif", ".webp", ".png", ".apng"):
+        if file_ext in (".gif", ".webp", ".png", ".apng"):
             frames, _ = CodecInfo._get_file_frames_duration_pillow(
                 file, frames_only=True
             )
@@ -183,7 +182,7 @@ def _get_file_frames_duration_pillow(
         total_duration = 0
 
         with Image.open(file) as im:
-            if "n_frames" in im.__dir__():
+            if "n_frames" in dir(im):
                 frames = im.n_frames
                 if frames_only is True:
                     return frames, 1
@@ -191,8 +190,8 @@ def _get_file_frames_duration_pillow(
                     im.seek(i)
                     total_duration += im.info.get("duration", 1000)
                 return frames, total_duration
-            else:
-                return 1, 0
+
+        return 1, 0
 
     @staticmethod
     def _get_file_frames_duration_webp(
@@ -201,13 +200,12 @@ def _get_file_frames_duration_webp(
         total_duration = 0
         frames = 0
 
-        f: BinaryIO
-        if isinstance(file, Path):
-            f = open(file, "r+b")
-        else:
-            f = BytesIO(file)
+        def _open_f(file: Union[Path, bytes]) -> BinaryIO:
+            if isinstance(file, Path):
+                return open(file, "r+b")
+            return BytesIO(file)
 
-        try:
+        with _open_f(file) as f:
             with mmap.mmap(f.fileno(), 0) as mm:
                 while True:
                     anmf_pos = mm.find(b"ANMF")
@@ -220,13 +218,11 @@ def _get_file_frames_duration_webp(
                     )
                     total_duration += int.from_bytes(frame_duration, "little")
                     frames += 1
-        finally:
-            f.close()
 
         if frames == 0:
             return 1, 0
-        else:
-            return frames, total_duration
+
+        return frames, total_duration
 
     @staticmethod
     def _get_file_frames_duration_av(
@@ -274,11 +270,10 @@ def _get_file_frames_duration_av(
             )
             if frame_count <= 1 or duration_metadata != 0:
                 return frame_count, duration_metadata
-            else:
-                duration_n_minus_one = last_frame.pts * time_base_ms
-                ms_per_frame = duration_n_minus_one / (frame_count - 1)
-                duration = frame_count * ms_per_frame
-                return frame_count, int(Decimal(duration).quantize(0, ROUND_HALF_UP))
+            duration_n_minus_one = last_frame.pts * time_base_ms
+            ms_per_frame = duration_n_minus_one / (frame_count - 1)
+            duration = frame_count * ms_per_frame
+            return frame_count, int(Decimal(duration).quantize(0, ROUND_HALF_UP))
 
         return 0, 0
 
@@ -300,7 +295,7 @@ def get_file_codec(file: Union[Path, bytes], file_ext: Optional[str] = None) ->
         try:
             with Image.open(file) as im:
                 codec = im.format
-                if "is_animated" in im.__dir__():
+                if "is_animated" in dir(im):
                     animated = im.is_animated
                 else:
                     animated = False
@@ -311,9 +306,8 @@ def get_file_codec(file: Union[Path, bytes], file_ext: Optional[str] = None) ->
             # Unable to distinguish apng and png
             if animated:
                 return "apng"
-            else:
-                return "png"
-        elif codec is not None:
+            return "png"
+        if codec is not None:
             return codec.lower()
 
         import av  # type: ignore
@@ -375,5 +369,4 @@ def get_file_ext(file: Path) -> str:
     def is_anim(file: Union[Path, bytes]) -> bool:
         if CodecInfo.get_file_frames(file, check_anim=True) > 1:
             return True
-        else:
-            return False
+        return False
diff --git a/src/sticker_convert/utils/media/decrypt_kakao.py b/src/sticker_convert/utils/media/decrypt_kakao.py
index 3da2f1fe..9303c9ee 100644
--- a/src/sticker_convert/utils/media/decrypt_kakao.py
+++ b/src/sticker_convert/utils/media/decrypt_kakao.py
@@ -3,11 +3,9 @@
 
 from typing import List
 
-"""
-References:
-https://github.com/blluv/KakaoTalkEmoticonDownloader
-https://github.com/star-39/moe-sticker-bot
-"""
+# References:
+# https://github.com/blluv/KakaoTalkEmoticonDownloader
+# https://github.com/star-39/moe-sticker-bot
 
 
 class DecryptKakao:
diff --git a/src/sticker_convert/utils/media/format_verify.py b/src/sticker_convert/utils/media/format_verify.py
index d51dec5c..d59dfc39 100755
--- a/src/sticker_convert/utils/media/format_verify.py
+++ b/src/sticker_convert/utils/media/format_verify.py
@@ -40,8 +40,7 @@ def check_file(file: Union[Path, bytes], spec: CompOption) -> bool:
     def check_presence(file: Union[Path, bytes]) -> bool:
         if isinstance(file, Path):
             return Path(file).is_file()
-        else:
-            return True
+        return True
 
     @staticmethod
     def check_file_res(
@@ -184,11 +183,10 @@ def check_format(
 
         if len(valid_fmt) == 0:
             return True
-        elif file_ext in valid_fmt:
+        if file_ext in valid_fmt:
             return True
-        elif file_ext in jpg_exts and (".jpg" in valid_fmt or ".jpeg" in valid_fmt):
+        if file_ext in jpg_exts and (".jpg" in valid_fmt or ".jpeg" in valid_fmt):
             return True
-        elif file_ext in png_exts and (".png" in valid_fmt or ".apng" in valid_fmt):
+        if file_ext in png_exts and (".png" in valid_fmt or ".apng" in valid_fmt):
             return True
-        else:
-            return False
+        return False
diff --git a/src/sticker_convert/utils/url_detect.py b/src/sticker_convert/utils/url_detect.py
index 24608122..89fec958 100755
--- a/src/sticker_convert/utils/url_detect.py
+++ b/src/sticker_convert/utils/url_detect.py
@@ -12,20 +12,19 @@ def detect(url: str) -> Optional[str]:
         if domain == "signal.art":
             return "signal"
 
-        elif domain in ("telegram.me", "t.me"):
+        if domain in ("telegram.me", "t.me"):
             return "telegram"
 
-        elif (
+        if (
             domain in ("store.line.me", "line.me")
             or url.startswith("line://shop/detail/")
             or (len(url) == 24 and all(c in string.hexdigits for c in url))
         ):
             return "line"
 
-        elif domain in ("e.kakao.com", "emoticon.kakao.com") or url.startswith(
+        if domain in ("e.kakao.com", "emoticon.kakao.com") or url.startswith(
             "kakaotalk://store/emoticon/"
         ):
             return "kakao"
 
-        else:
-            return None
+        return None