add code sample for pandas-dev#36003

Author: simonjayhawkins

bisect/36003.py

@@ -0,0 +1,34 @@
+import datetime
+
+import pandas as pd
+import pandas.testing as tm
+
+print(pd.__version__)
+
+
+df = pd.DataFrame(
+    {
+        "A": ["X", "Y"],
+        "B": [
+            datetime.datetime(2005, 1, 1, 10, 30, 23, 540000),
+            datetime.datetime(3005, 1, 1, 10, 30, 23, 540000),
+        ],
+    }
+)
+print(df)
+
+print(df.dtypes)
+
+result = df.groupby("A").B.max()
+print(result)
+
+expected = pd.Series(
+    [
+        pd.Timestamp("2005-01-01 10:30:23.540000"),
+        datetime.datetime(3005, 1, 1, 10, 30, 23, 540000),
+    ],
+    index=pd.Index(["X", "Y"], dtype="object", name="A"),
+    name="B",
+)
+
+tm.assert_series_equal(result, expected)