Fixed pandas-dev#38419 - BUG: set_index screws up the dtypes on empty DataFrames

jordi-crespo · jordi-crespo · commit f30caa09036a · 2020-12-12T22:19:38.000+01:00
diff --git a/pandas/tests/frame/methods/test_set_index.py b/pandas/tests/frame/methods/test_set_index.py
@@ -50,11 +50,7 @@ def test_set_index_empty_column(self):
     def test_set_index_empty_dataframe(self):
         # GH#38419
         df = DataFrame(
-            {
-                'a': Series(dtype='datetime64[ns]'),
-                'b': Series(dtype='int64'),
-                'c': []
-            }
+            {"a": Series(dtype="datetime64[ns]"), "b": Series(dtype="int64"), "c": []}
         )
 
         if df.empty:
