BUG: _tidy_repr should not be called when max_rows is None

doc/source/release.rst

@@ -364,6 +364,7 @@ Bug Fixes
 - Bug in ``DataFrame.replace()`` where changing a dtype through replacement
   would only replace the first occurrence of a value (:issue:`6689`)
 - Better error message when passing a frequency of 'MS' in ``Period`` construction (GH5332)
+- Bug in `Series.__unicode__` when `max_rows` is `None` and the Series has more than 1000 rows. (:issue:`6863`)
 
 pandas 0.13.1
 -------------

pandas/core/series.py

@@ -828,7 +828,7 @@ def __unicode__(self):
         width, height = get_terminal_size()
         max_rows = (height if get_option("display.max_rows") == 0
                     else get_option("display.max_rows"))
-        if len(self.index) > (max_rows or 1000):
+        if max_rows and len(self.index) > max_rows:
             result = self._tidy_repr(min(30, max_rows - 4))
         elif len(self.index) > 0:
             result = self._get_repr(print_header=True,

pandas/tests/test_series.py

@@ -1770,6 +1770,11 @@ def test_repr_should_return_str(self):
         df = Series(data, index=index1)
         self.assertTrue(type(df.__repr__() == str))  # both py2 / 3
 
+    def test_repr_max_rows(self):
+        # GH 6863
+        with pd.option_context('max_rows', None):
+            str(Series(range(1001))) # should not raise exception
+
     def test_unicode_string_with_unicode(self):
         df = Series([u("\u05d0")], name=u("\u05d1"))
         if compat.PY3: