add ArrowStringArray to pd.arrays namespace

Author: simonjayhawkins

doc/source/reference/arrays.rst

@@ -480,6 +480,7 @@ we recommend using :class:`StringDtype` (with the alias ``"string"``).
    :template: autosummary/class_without_autosummary.rst
 
    arrays.StringArray
+   arrays.ArrowStringArray
 
 .. autosummary::
    :toctree: api/

pandas/arrays/__init__.py

@@ -4,6 +4,7 @@
 See :ref:`extending.extension-types` for more.
 """
 from pandas.core.arrays import (
+    ArrowStringArray,
     BooleanArray,
     Categorical,
     DatetimeArray,
@@ -18,6 +19,7 @@
 )
 
 __all__ = [
+    "ArrowStringArray",
     "BooleanArray",
     "Categorical",
     "DatetimeArray",

pandas/core/arrays/__init__.py

@@ -17,12 +17,14 @@
 )
 from pandas.core.arrays.sparse import SparseArray
 from pandas.core.arrays.string_ import StringArray
+from pandas.core.arrays.string_arrow import ArrowStringArray
 from pandas.core.arrays.timedeltas import TimedeltaArray
 
 __all__ = [
     "ExtensionArray",
     "ExtensionOpsMixin",
     "ExtensionScalarOpsMixin",
+    "ArrowStringArray",
     "BaseMaskedArray",
     "BooleanArray",
     "Categorical",

pandas/core/arrays/string_arrow.py

@@ -673,7 +673,8 @@ def astype(self, dtype, copy=True):
     # ------------------------------------------------------------------------
     # String methods interface
 
-    _str_na_value = StringDtype.na_value
+    # error: Cannot determine type of 'na_value'
+    _str_na_value = StringDtype.na_value  # type: ignore[has-type]
 
     def _str_map(
         self, f, na_value=None, dtype: Dtype | None = None, convert: bool = True