Merge pull request #5335 from goyodiaz/repr_empty

BUG: empty series not printing name in repr (#4651)

Author: jreback

doc/source/release.rst

@@ -768,7 +768,7 @@ Bug Fixes
  elements. (:issue:`5372`)
  - The GroupBy methods ``transform`` and ``filter`` can be used on Series
  and DataFrames that have repeated (non-unique) indices. (:issue:`4620`)
-
+ - Fix empty series not printing name in repr (:issue:`4651`)
 
 pandas 0.12.0
 -------------

pandas/core/series.py

@@ -844,8 +844,11 @@ def __unicode__(self):
  length=len(self) > 50,
  name=True,
  dtype=True)
+ elif self.name is None:
+ result = u('Series([], dtype: %s)') % (self.dtype)
  else:
- result = u('Series([], dtype: %s)') % self.dtype
+ result = u('Series([], name: %s, dtype: %s)') % (self.name,
+ self.dtype)
  return result
 
  def _tidy_repr(self, max_vals=20):

pandas/tests/test_series.py

@@ -1580,6 +1580,13 @@ def test_repr(self):
  self.assertFalse("\r" in repr(ser))
  self.assertFalse("a\n" in repr(ser))
 
+ # with empty series (#4651)
+ s = Series([], dtype=np.int64, name='foo')
+ self.assertEqual(repr(s), 'Series([], name: foo, dtype: int64)')
+
+ s = Series([], dtype=np.int64, name=None)
+ self.assertEqual(repr(s), 'Series([], dtype: int64)')
+
  def test_tidy_repr(self):
  a = Series([u("\u05d0")] * 1000)
  a.name = 'title1'