Update datetimelike.py

Author: AnonToky

pandas/core/indexes/datetimelike.py

@@ -199,7 +199,38 @@ def equals(self, other: Any) -> bool:
 
     def __contains__(self, key: Any) -> bool:
         """
-        Return True if the key is in the Index.
+        Return a boolean indicating whether the provided key is in the index.
+
+        Parameters
+        ----------
+        key : label
+            The key to check if it is present in the index.
+
+        Returns
+        -------
+        bool
+            Whether the key search is in the index.
+
+        Raises
+        ------
+        TypeError
+            If the key is not hashable.
+
+        See Also
+        --------
+        Index.isin : Returns an ndarray of boolean dtype indicating whether the
+            list-like key is in the index.
+
+        Examples
+        --------
+        >>> idx = pd.Index([1, 2, 3, 4])
+        >>> idx
+        Index([1, 2, 3, 4], dtype='int64')
+
+        >>> 2 in idx
+        True
+        >>> 6 in idx
+        False
         """
         hash(key)
         try:
@@ -245,7 +276,16 @@ def _format_attrs(self):
 
     def _summary(self, name=None) -> str:
         """
-        Return a summary of the Index.
+        Return a summarized representation.
+
+        Parameters
+        ----------
+        name : str
+            name to use in the summary representation
+
+        Returns
+        -------
+        String with a summarized representation of the index
         """
         result = super()._summary(name=name)
         if self.freq: