feat: update pyproject.toml;

pyproject.toml

@@ -4,7 +4,7 @@ requires = ["setuptools>=71"]
 [project]
 name = "ai4ts"
 description = "AI for Time Series"
-authors = [{ name = "Wenjie Du", email = "[email protected]" }]
+authors = [{ name = "Wenjie Du", email = "[email protected]" }]
 dynamic = ["version", "readme", "dependencies", "optional-dependencies"]
 license = { file = "LICENSE" }
 requires-python = ">=3.8"
@@ -61,11 +61,24 @@ exclude = [
 version = { attr = "ai4ts.version.__version__" }
 readme = { file = "README.md", content-type = "text/markdown" }
 
+[tool.black]
+line-length = 120
+
 [tool.flake8]
+# People may argue that coding style is personal. This may be true if the project is personal and one works like a
+# hermit, but to PyPOTS and its community, the answer is NO.
+# We use Black and Flake8 to lint code style and keep the style consistent across all commits and pull requests.
+# Black only reformats the code, and Flake8 is necessary for checking for some other issues not covered by Black.
+
+# The Black line length is default as 88, while the default of Flake8 is 79. However, considering our monitors are
+# much more advanced nowadays, I extend the maximum line length to 120, like other project e.g. transformers. People
+# who prefer the default setting can keep using 88 or 79 while coding. Please ensure your code lines not exceeding 120.
 max-line-length = 120
 # why ignore E203? Refer to https://github.com/PyCQA/pycodestyle/issues/373
+# why ignore E231? Bad trailing comma, conflict with Black
 extend-ignore = """
-    E203
+    E203,
+    E231,
 """
 # ignore some errors that are not important in template files
 exclude = [