BUG: Compare names with None in DataFrame ctor

Closes #16114

Author: Tom Augspurger <[email protected]>

Closes #16117 from TomAugspurger/int_dtypes and squashes the following commits:

7f7a32e [Tom Augspurger] DOC: Add a release note
0663098 [Tom Augspurger] BUG: Compare names with None in DataFrame ctor

Author: TomAugspurger

pandas/core/frame.py

@@ -296,7 +296,7 @@ def __init__(self, data=None, index=None, columns=None, dtype=None,
                 if columns is None:
                     columns = data_columns
                 mgr = self._init_dict(data, index, columns, dtype=dtype)
-            elif getattr(data, 'name', None):
+            elif getattr(data, 'name', None) is not None:
                 mgr = self._init_dict({data.name: data}, index, columns,
                                       dtype=dtype)
             else:

pandas/tests/frame/test_constructors.py

@@ -1888,6 +1888,15 @@ def test_from_records_len0_with_columns(self):
         self.assertEqual(len(result), 0)
         self.assertEqual(result.index.name, 'foo')
 
+    def test_to_frame_with_falsey_names(self):
+        # GH 16114
+        result = Series(name=0).to_frame().dtypes
+        expected = Series({0: np.float64})
+        tm.assert_series_equal(result, expected)
+
+        result = DataFrame(Series(name=0)).dtypes
+        tm.assert_series_equal(result, expected)
+
 
 class TestDataFrameConstructorWithDatetimeTZ(tm.TestCase, TestData):