REF: move implementations to mixing class

pandas/core/arrays/_arrow_string_mixins.py

@@ -42,6 +42,37 @@ def _convert_int_result(self, result):
         # Convert an integer-dtype result to the appropriate result type
         raise NotImplementedError
 
+    def _str_len(self):
+        result = pc.utf8_length(self._pa_array)
+        return self._convert_int_result(result)
+
+    def _str_lower(self) -> Self:
+        return type(self)(pc.utf8_lower(self._pa_array))
+
+    def _str_upper(self) -> Self:
+        return type(self)(pc.utf8_upper(self._pa_array))
+
+    def _str_strip(self, to_strip=None) -> Self:
+        if to_strip is None:
+            result = pc.utf8_trim_whitespace(self._pa_array)
+        else:
+            result = pc.utf8_trim(self._pa_array, characters=to_strip)
+        return type(self)(result)
+
+    def _str_lstrip(self, to_strip=None) -> Self:
+        if to_strip is None:
+            result = pc.utf8_ltrim_whitespace(self._pa_array)
+        else:
+            result = pc.utf8_ltrim(self._pa_array, characters=to_strip)
+        return type(self)(result)
+
+    def _str_rstrip(self, to_strip=None) -> Self:
+        if to_strip is None:
+            result = pc.utf8_rtrim_whitespace(self._pa_array)
+        else:
+            result = pc.utf8_rtrim(self._pa_array, characters=to_strip)
+        return type(self)(result)
+
     def _str_pad(
         self,
         width: int,
@@ -190,3 +221,17 @@ def _str_istitle(self):
     def _str_isupper(self):
         result = pc.utf8_is_upper(self._pa_array)
         return self._convert_bool_result(result)
+
+    def _str_match(
+        self, pat: str, case: bool = True, flags: int = 0, na: Scalar | None = None
+    ):
+        if not pat.startswith("^"):
+            pat = f"^{pat}"
+        return self._str_contains(pat, case, flags, na, regex=True)
+
+    def _str_fullmatch(
+        self, pat, case: bool = True, flags: int = 0, na: Scalar | None = None
+    ):
+        if not pat.endswith("$") or pat.endswith("\\$"):
+            pat = f"{pat}$"
+        return self._str_match(pat, case, flags, na)

pandas/core/arrays/arrow/array.py

@@ -1998,7 +1998,7 @@ def _rank(
         """
         See Series.rank.__doc__.
         """
-        return type(self)(
+        return self._convert_int_result(
             self._rank_calc(
                 axis=axis,
                 method=method,
@@ -2337,9 +2337,6 @@ def _str_contains(
             result = result.fill_null(na)
         return type(self)(result)
 
-    def _result_converter(self, result):
-        return type(self)(result)
-
     def _str_replace(
         self,
         pat: str | re.Pattern,
@@ -2374,20 +2371,6 @@ def _str_repeat(self, repeats: int | Sequence[int]) -> Self:
             )
         return type(self)(pc.binary_repeat(self._pa_array, repeats))
 
-    def _str_match(
-        self, pat: str, case: bool = True, flags: int = 0, na: Scalar | None = None
-    ) -> Self:
-        if not pat.startswith("^"):
-            pat = f"^{pat}"
-        return self._str_contains(pat, case, flags, na, regex=True)
-
-    def _str_fullmatch(
-        self, pat, case: bool = True, flags: int = 0, na: Scalar | None = None
-    ) -> Self:
-        if not pat.endswith("$") or pat.endswith("\\$"):
-            pat = f"{pat}$"
-        return self._str_match(pat, case, flags, na)
-
     def _str_find(self, sub: str, start: int = 0, end: int | None = None) -> Self:
         if (start == 0 or start is None) and end is None:
             result = pc.find_substring(self._pa_array, sub)
@@ -2442,36 +2425,6 @@ def _str_slice(
             pc.utf8_slice_codeunits(self._pa_array, start=start, stop=stop, step=step)
         )
 
-    def _str_len(self) -> Self:
-        return type(self)(pc.utf8_length(self._pa_array))
-
-    def _str_lower(self) -> Self:
-        return type(self)(pc.utf8_lower(self._pa_array))
-
-    def _str_upper(self) -> Self:
-        return type(self)(pc.utf8_upper(self._pa_array))
-
-    def _str_strip(self, to_strip=None) -> Self:
-        if to_strip is None:
-            result = pc.utf8_trim_whitespace(self._pa_array)
-        else:
-            result = pc.utf8_trim(self._pa_array, characters=to_strip)
-        return type(self)(result)
-
-    def _str_lstrip(self, to_strip=None) -> Self:
-        if to_strip is None:
-            result = pc.utf8_ltrim_whitespace(self._pa_array)
-        else:
-            result = pc.utf8_ltrim(self._pa_array, characters=to_strip)
-        return type(self)(result)
-
-    def _str_rstrip(self, to_strip=None) -> Self:
-        if to_strip is None:
-            result = pc.utf8_rtrim_whitespace(self._pa_array)
-        else:
-            result = pc.utf8_rtrim(self._pa_array, characters=to_strip)
-        return type(self)(result)
-
     def _str_removeprefix(self, prefix: str):
         if not pa_version_under13p0:
             starts_with = pc.starts_with(self._pa_array, pattern=prefix)

pandas/core/arrays/string_arrow.py

@@ -54,7 +54,6 @@
 
     from pandas._typing import (
         ArrayLike,
-        AxisInt,
         Dtype,
         Self,
         npt,
@@ -294,19 +293,22 @@ def astype(self, dtype, copy: bool = True):
     _str_startswith = ArrowStringArrayMixin._str_startswith
     _str_endswith = ArrowStringArrayMixin._str_endswith
     _str_pad = ArrowStringArrayMixin._str_pad
-    _str_match = ArrowExtensionArray._str_match
-    _str_fullmatch = ArrowExtensionArray._str_fullmatch
-    _str_lower = ArrowExtensionArray._str_lower
-    _str_upper = ArrowExtensionArray._str_upper
-    _str_strip = ArrowExtensionArray._str_strip
-    _str_lstrip = ArrowExtensionArray._str_lstrip
-    _str_rstrip = ArrowExtensionArray._str_rstrip
+    _str_match = ArrowStringArrayMixin._str_match
+    _str_fullmatch = ArrowStringArrayMixin._str_fullmatch
+    _str_lower = ArrowStringArrayMixin._str_lower
+    _str_upper = ArrowStringArrayMixin._str_upper
+    _str_strip = ArrowStringArrayMixin._str_strip
+    _str_lstrip = ArrowStringArrayMixin._str_lstrip
+    _str_rstrip = ArrowStringArrayMixin._str_rstrip
     _str_removesuffix = ArrowStringArrayMixin._str_removesuffix
     _str_get = ArrowStringArrayMixin._str_get
     _str_capitalize = ArrowStringArrayMixin._str_capitalize
     _str_title = ArrowStringArrayMixin._str_title
     _str_swapcase = ArrowStringArrayMixin._str_swapcase
     _str_slice_replace = ArrowStringArrayMixin._str_slice_replace
+    _str_len = ArrowStringArrayMixin._str_len
+
+    _rank = ArrowExtensionArray._rank
 
     def _str_contains(
         self, pat, case: bool = True, flags: int = 0, na=np.nan, regex: bool = True
@@ -362,10 +364,6 @@ def _str_slice(
             return super()._str_slice(start, stop, step)
         return ArrowExtensionArray._str_slice(self, start=start, stop=stop, step=step)
 
-    def _str_len(self):
-        result = pc.utf8_length(self._pa_array)
-        return self._convert_int_result(result)
-
     def _str_removeprefix(self, prefix: str):
         if not pa_version_under13p0:
             return ArrowExtensionArray._str_removeprefix(self, prefix)
@@ -431,28 +429,6 @@ def _reduce(
         else:
             return result
 
-    def _rank(
-        self,
-        *,
-        axis: AxisInt = 0,
-        method: str = "average",
-        na_option: str = "keep",
-        ascending: bool = True,
-        pct: bool = False,
-    ):
-        """
-        See Series.rank.__doc__.
-        """
-        return self._convert_int_result(
-            self._rank_calc(
-                axis=axis,
-                method=method,
-                na_option=na_option,
-                ascending=ascending,
-                pct=pct,
-            )
-        )
-
     def value_counts(self, dropna: bool = True) -> Series:
         result = super().value_counts(dropna=dropna)
         if self.dtype.na_value is np.nan: