DOC: ficing RT03 errors for Index: drop_duplicates and memory_usage (#58434)

Author: KeiOshima

ci/code_checks.sh

@@ -111,7 +111,6 @@ if [[ -z "$CHECK" || "$CHECK" == "docstrings" ]]; then
         -i "pandas.Index.copy PR07,SA01" \
         -i "pandas.Index.difference PR07,RT03,SA01" \
         -i "pandas.Index.drop PR07,SA01" \
-        -i "pandas.Index.drop_duplicates RT03" \
         -i "pandas.Index.droplevel RT03,SA01" \
         -i "pandas.Index.dropna RT03,SA01" \
         -i "pandas.Index.duplicated RT03" \
@@ -125,7 +124,6 @@ if [[ -z "$CHECK" || "$CHECK" == "docstrings" ]]; then
         -i "pandas.Index.insert PR07,RT03,SA01" \
         -i "pandas.Index.intersection PR07,RT03,SA01" \
         -i "pandas.Index.join PR07,RT03,SA01" \
-        -i "pandas.Index.memory_usage RT03" \
         -i "pandas.Index.names GL08" \
         -i "pandas.Index.nunique RT03" \
         -i "pandas.Index.putmask PR01,RT03" \

pandas/core/base.py

@@ -1170,6 +1170,7 @@ def _memory_usage(self, deep: bool = False) -> int:
         Returns
         -------
         bytes used
+            Returns memory usage of the values in the Index in bytes.
 
         See Also
         --------

pandas/core/indexes/base.py

@@ -2684,6 +2684,7 @@ def drop_duplicates(self, *, keep: DropKeep = "first") -> Self:
         Returns
         -------
         Index
+            A new Index object with the duplicate values removed.
 
         See Also
         --------