wip

Author: MarcoGorelli

doc/source/whatsnew/v2.0.0.rst

@@ -790,6 +790,8 @@ Datetimelike
 - Bug in :func:`to_datetime` was raising ``ValueError`` when parsing :class:`Timestamp`, ``datetime.datetime``, ``datetime.date``, or ``np.datetime64`` objects when non-ISO8601 ``format`` was passed (:issue:`49298`, :issue:`50036`)
 - Bug in :func:`to_datetime` was raising ``ValueError`` when parsing empty string and non-ISO8601 format was passed. Now, empty strings will be parsed as :class:`NaT`, for compatibility with how is done for ISO8601 formats (:issue:`50251`)
 - Bug in :class:`Timestamp` was showing ``UserWarning``, which was not actionable by users, when parsing non-ISO8601 delimited date strings (:issue:`50232`)
+- Bug in :class:`Timestamp` was showing ``UserWarning`` which was not actionable by users (:issue:`50232`)
+- Bug in :func:`to_datetime` was raising ``ValueError`` when parsing empty string and non-ISO8601 format was passed. Now, empty strings will be parsed as :class:`NaT`, for compatibility with how is done for ISO8601 formats (:issue:`50251`)
 -
 
 Timedelta

pandas/tests/tools/test_to_datetime.py

@@ -1826,7 +1826,10 @@ def test_dataframe_mixed(self, cache):
     def test_dataframe_float(self, cache):
         # float
         df = DataFrame({"year": [2000, 2001], "month": [1.5, 1], "day": [1, 1]})
-        msg = "cannot assemble the datetimes: unconverted data remains: 1"
+        msg = (
+            'cannot assemble the datetimes: time data "20000151" at position 0 '
+            'doesn\'t match format "%Y%m%d"'
+        )
         with pytest.raises(ValueError, match=msg):
             to_datetime(df, cache=cache)
 
@@ -3006,6 +3009,7 @@ def test_na_to_datetime(nulls_fixture, klass):
 
 
 @pytest.mark.parametrize("errors", ["raise", "coerce", "ignore"])
+<<<<<<< HEAD
 @pytest.mark.parametrize(
     "args, format",
     [
@@ -3017,6 +3021,12 @@ def test_na_to_datetime(nulls_fixture, klass):
 def test_empty_string_datetime(errors, args, format):
     # GH13044, GH50251
     td = Series(args)
+=======
+def test_empty_string_datetime_coerce_format(errors):
+    # GH13044, GH50251
+    td = Series(["03/24/2016", "03/25/2016", ""])
+    format = "%m/%d/%Y"
+>>>>>>> 8fad3173b2aca474c43af653dba9da86cbc421d4
 
     # coerce empty string to pd.NaT
     result = to_datetime(td, format=format, errors=errors)