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BUG: Fixed DataFrame info() for duplicated columns, GH11761 #11772

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BUG: Fixed DataFrame info() for duplicated columns, GH11761 #11772

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6 changes: 6 additions & 0 deletions doc/source/whatsnew/v0.18.0.txt
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Expand Up @@ -196,3 +196,9 @@ Bug Fixes
- Bug in ``pd.rolling_median`` where memory allocation failed even with sufficient memory (:issue:`11696`)

- Bug in ``df.replace`` while replacing value in mixed dtype ``Dataframe`` (:issue:`11698`)





- Bug in ``DataFrame.info`` when duplicated column names exist (:issue:`11761`)
2 changes: 1 addition & 1 deletion pandas/core/frame.py
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Expand Up @@ -1655,7 +1655,7 @@ def _verbose_repr():

dtypes = self.dtypes
for i, col in enumerate(self.columns):
dtype = dtypes[col]
dtype = dtypes.iloc[i]
col = com.pprint_thing(col)

count = ""
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12 changes: 12 additions & 0 deletions pandas/tests/test_frame.py
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Expand Up @@ -7559,6 +7559,18 @@ def test_info_duplicate_columns(self):
columns=['a', 'a', 'b', 'b'])
frame.info(buf=io)

def test_info_duplicate_columns_shows_correct_dtypes(self):
# GH11761
io = StringIO()

frame = DataFrame([[1, 2.0]],
columns=['a', 'a'])
frame.info(buf=io)
io.seek(0)
lines = io.readlines()
self.assertEqual('a 1 non-null int64\n', lines[3])
self.assertEqual('a 1 non-null float64\n', lines[4])

def test_info_shows_column_dtypes(self):
dtypes = ['int64', 'float64', 'datetime64[ns]', 'timedelta64[ns]',
'complex128', 'object', 'bool']
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