Fix pandas.api.extensions.ExtensionArray._values_for_factorize

Add 'See Also' section

Author: ivonastojanovic

ci/code_checks.sh

@@ -193,7 +193,6 @@ if [[ -z "$CHECK" || "$CHECK" == "docstrings" ]]; then
         -i "pandas.Timestamp.tzinfo GL08" \
         -i "pandas.Timestamp.value GL08" \
         -i "pandas.Timestamp.year GL08" \
-        -i "pandas.api.extensions.ExtensionArray._values_for_factorize SA01" \
         -i "pandas.api.extensions.ExtensionArray.astype SA01" \
         -i "pandas.api.extensions.ExtensionArray.dropna RT03,SA01" \
         -i "pandas.api.extensions.ExtensionArray.dtype SA01" \

pandas/core/arrays/base.py

@@ -1439,6 +1439,10 @@ def _values_for_factorize(self) -> tuple[np.ndarray, Any]:
             `-1` and not included in `uniques`. By default,
             ``np.nan`` is used.
 
+        See Also
+        --------
+        util.hash_pandas_object : Hash the pandas object.
+
         Notes
         -----
         The values returned by this method are also used in