update

reidy-p · reidy-p · commit ea39791c687f · 2018-07-09T16:54:47.000+01:00
diff --git a/pandas/core/indexes/datetimes.py b/pandas/core/indexes/datetimes.py
@@ -12,6 +12,7 @@
 from pandas.core.dtypes.common import (
     _INT64_DTYPE,
     _NS_DTYPE,
+    is_object_dtype,
     is_datetime64_dtype,
     is_datetimetz,
     is_dtype_equal,
