fixup! DOC: add examples to groupby.first

Author: Moisan

pandas/core/groupby/groupby.py

@@ -2322,24 +2322,24 @@ def first(self, numeric_only: bool = False, min_count: int = -1):
 
         Examples
         --------
-        >>> df = pd.DataFrame(dict(A=[1, 1, 3], B=[2, 2, None],
-        ...                        C=['3/11/2000', '3/12/2000', '3/13/2000']))
-        >>> df['C'] = pd.to_datetime(df['C'])
+        >>> df = pd.DataFrame(dict(A=[1, 1, 3], B=[None, 5, 6], C=[1,2,3],
+        ...                        D=['3/11/2000', '3/12/2000', '3/13/2000']))
+        >>> df['D'] = pd.to_datetime(df['D'])
         >>> df.groupby("A").first()
-             B          C
+             B  C          D
         A
-        1  2.0 2000-03-11
-        3  NaN 2000-03-13
+        1  5.0  1 2000-03-11
+        3  6.0  3 2000-03-13
         >>> df.groupby("A").first(min_count=2)
-             B          C
+            B    C          D
         A
-        1  2.0 2000-03-11
-        3  NaN        NaT
+        1 NaN  1.0 2000-03-11
+        3 NaN  NaN        NaT
         >>> df.groupby("A").first(numeric_only=True)
-             B
+             B  C
         A
-        1  2.0
-        3  NaN
+        1  5.0  1
+        3  6.0  3
         """
 
         def first_compat(obj: NDFrameT, axis: int = 0):