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BUG: HDFStore bug when appending to a table, .typ not recreated on subsequent appends #3126

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Merged
merged 1 commit into from
Mar 21, 2013
Merged

BUG: HDFStore bug when appending to a table, .typ not recreated on subsequent appends #3126

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4 changes: 4 additions & 0 deletions pandas/io/pytables.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1162,6 +1162,10 @@ def set_kind(self):
elif self.dtype.startswith('bool'):
self.kind = 'bool'

# set my typ if we need
if self.typ is None:
self.typ = getattr(self.description,self.cname,None)

def set_atom(self, block, existing_col, min_itemsize, nan_rep, **kwargs):
""" create and setup my atom from the block b """

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9 changes: 9 additions & 0 deletions pandas/io/tests/test_pytables.py
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Expand Up @@ -659,6 +659,15 @@ def check_col(key,name,size):
result = store.select('df')
tm.assert_frame_equal(result, df)

with ensure_clean(self.path) as store:

# infer the .typ on subsequent appends
df = DataFrame(dict(A = 'foo', B = 'bar'),index=range(10))
store.remove('df')
store.append('df', df[:5], min_itemsize=200)
store.append('df', df[5:], min_itemsize=200)
tm.assert_frame_equal(store['df'], df)

def test_append_with_data_columns(self):

with ensure_clean(self.path) as store:
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