Fix pandas.api.extensions.ExtensionArray.dropna

Add return value description and 'See Also' section

Author: ivonastojanovic

ci/code_checks.sh

@@ -248,7 +248,6 @@ if [[ -z "$CHECK" || "$CHECK" == "docstrings" ]]; then
         -i "pandas.Timestamp.utctimetuple SA01" \
         -i "pandas.Timestamp.value GL08" \
         -i "pandas.Timestamp.year GL08" \
-        -i "pandas.api.extensions.ExtensionArray.dropna RT03,SA01" \
         -i "pandas.api.extensions.ExtensionArray.dtype SA01" \
         -i "pandas.api.extensions.ExtensionArray.duplicated RT03,SA01" \
         -i "pandas.api.extensions.ExtensionArray.fillna SA01" \

pandas/core/arrays/base.py

@@ -1160,6 +1160,16 @@ def dropna(self) -> Self:
 
         Returns
         -------
+        Self
+            An ExtensionArray of the same type as the original but with all
+            NA values removed.
+
+        See Also
+        --------
+        Series.dropna : Remove missing values from a Series.
+        DataFrame.dropna : Remove missing values from a DataFrame.
+        api.extensions.ExtensionArray.isna : Check for missing values in
+            an ExtensionArray.
 
         Examples
         --------