DOC: Adding example and See also to head and tail method (#16416)

Author: Cheukting

pandas/core/generic.py

@@ -3564,35 +3564,39 @@ def head(self, n=5):
         obj_head : type of caller
             The first n rows of the caller object.
 
+        See Also
+        --------
+        pandas.DataFrame.tail
+
         Examples
         --------
-        >>> df = pd.DataFrame({'animal':['falcon', 'parrot', 'lion',
-        ...                   'monkey', 'shark', 'bee', 'bear']})
+        >>> df = pd.DataFrame({'animal':['bear', 'bee', 'falcon',
+        ...                   'lion', 'monkey', 'parrot', 'shark']})
         >>> df
            animal
-        0  falcon
-        1  parrot
-        2    lion
-        3  monkey
-        4   shark
-        5     bee
-        6    bear
+        0    bear
+        1     bee
+        2  falcon
+        3    lion
+        4  monkey
+        5  parrot
+        6   shark
 
         Viewing the last 5 lines (the default)
         >>> df.head()
            animal
-        0  falcon
-        1  parrot
-        2    lion
-        3  monkey
-        4   shark
+        0    bear
+        1     bee
+        2  falcon
+        3    lion
+        4  monkey
 
         Viewing the last n lines (three in this case)
         >>> df.head(3)
            animal
-        0  falcon
-        1  parrot
-        2    lion
+        0    bear
+        1     bee
+        2  falcon
         """
 
         return self.iloc[:n]
@@ -3611,35 +3615,39 @@ def tail(self, n=5):
         obj_tail : type of caller
             The last n rows of the caller object.
 
+        See Also
+        --------
+        pandas.DataFrame.head
+
         Examples
         --------
         >>> df = pd.DataFrame({'animal':['falcon', 'parrot', 'lion',
         ...                   'monkey', 'shark', 'bee', 'bear']})
         >>> df
            animal
-        0  falcon
-        1  parrot
-        2    lion
-        3  monkey
-        4   shark
-        5     bee
-        6    bear
+        0    bear
+        1     bee
+        2  falcon
+        3    lion
+        4  monkey
+        5  parrot
+        6   shark
 
         Viewing the last 5 lines (the default)
         >>> df.tail()
            animal
-        2    lion
-        3  monkey
-        4   shark
-        5     bee
-        6    bear
+        2  falcon
+        3    lion
+        4  monkey
+        5  parrot
+        6   shark
 
         Viewing the last n lines (three in this case)
         >>> df.tail(3)
-          animal
-        4  shark
-        5    bee
-        6   bear
+           animal
+        4  monkey
+        5  parrot
+        6   shark
 
         """