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Merged
merged 1 commit into from
Feb 19, 2014
+9 −1
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TST: GH6410 / numpy 4328 #6413

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1 change: 0 additions & 1 deletion pandas/core/groupby.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1849,7 +1849,6 @@ def transform(self, func, *args, **kwargs):

for name, group in self:

group = com.ensure_float(group)
object.__setattr__(group, 'name', name)
res = wrapper(group)
if hasattr(res, 'values'):
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9 changes: 9 additions & 0 deletions pandas/tests/test_groupby.py
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Expand Up @@ -2731,6 +2731,15 @@ def test_groupby_max_datetime64(self):
result = df.groupby('A')['A'].max()
assert_series_equal(result,expected)

def test_groupby_datetime64_32_bit(self):
# GH 6410 / numpy 4328
# 32-bit under 1.9-dev indexing issue

df = DataFrame({"A": range(2), "B": [pd.Timestamp('2000-01-1')]*2})
result = df.groupby("A")["B"].transform(min)
expected = Series([pd.Timestamp('2000-01-1')]*2)
assert_series_equal(result,expected)

def test_groupby_categorical_unequal_len(self):
import pandas as pd
#GH3011
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