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BUG: Iteration over DatetimeIndex stops at chunksize (GH21012) #21027

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Merged
merged 1 commit into from
May 15, 2018
Merged

BUG: Iteration over DatetimeIndex stops at chunksize (GH21012) #21027

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3 changes: 2 additions & 1 deletion pandas/core/indexes/datetimes.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1365,7 +1365,8 @@ def __iter__(self):
converted = libts.ints_to_pydatetime(data[start_i:end_i],
tz=self.tz, freq=self.freq,
box="timestamp")
return iter(converted)
for v in converted:
yield v

def _wrap_union_result(self, other, result):
name = self.name if self.name == other.name else None
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11 changes: 11 additions & 0 deletions pandas/tests/indexes/datetimes/test_datetime.py
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Expand Up @@ -153,6 +153,17 @@ def test_iteration_preserves_tz(self):
assert result._repr_base == expected._repr_base
assert result == expected

@pytest.mark.parametrize('periods', [0, 9999, 10000, 10001])
def test_iteration_over_chunksize(self, periods):
# GH21012

index = date_range('2000-01-01 00:00:00', periods=periods, freq='min')
num = 0
for stamp in index:
assert index[num] == stamp
num += 1
assert num == len(index)

def test_misc_coverage(self):
rng = date_range('1/1/2000', periods=5)
result = rng.groupby(rng.day)
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