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Python 2.7.6 (default, Mar 22 2014, 22:59:56)
[GCC 4.8.2] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import pandas
>>> a = pandas.Series()
>>> a.loc[1] = 1
>>> a.loc['a'] = 2
>>> a.loc[[-1, -2]]
1 1
a 2
dtype: int64
This is ok:
>>> a.loc[-1]
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/tmp/venv/local/lib/python2.7/site-packages/pandas/core/indexing.py", line 1129, in __getitem__
return self._getitem_axis(key, axis=0)
File "/tmp/venv/local/lib/python2.7/site-packages/pandas/core/indexing.py", line 1261, in _getitem_axis
self._has_valid_type(key, axis)
File "/tmp/venv/local/lib/python2.7/site-packages/pandas/core/indexing.py", line 1234, in _has_valid_type
error()
File "/tmp/venv/local/lib/python2.7/site-packages/pandas/core/indexing.py", line 1221, in error
(key, self.obj._get_axis_name(axis)))
KeyError: 'the label [-1] is not in the [index]'
>>> a
1 1
-1 3
dtype: int64
>>> a['a'] = 2
>>> a
1 1
-1 3
a 2
dtype: int64
>>> a.loc[[-2]] = 0
>>> a
1 0
-1 3
a 2
dtype: int64
Without 'a' string in the index it raises while I expect new item ({-2: 0}) to be added
>>> del a['a']
>>> a.loc[[-2]] = 0
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/tmp/venv/local/lib/python2.7/site-packages/pandas/core/indexing.py", line 117, in __setitem__
indexer = self._convert_to_indexer(key, is_setter=True)
File "/tmp/venv/local/lib/python2.7/site-packages/pandas/core/indexing.py", line 1068, in _convert_to_indexer
raise KeyError('%s not in index' % objarr[mask])
KeyError: '[-2] not in index'
The text was updated successfully, but these errors were encountered:
This is ok:
This is ok too:
But this is not:
And this is not good at all:
Without
'a'
string in the index it raises while I expect new item ({-2: 0}
) to be addedThe text was updated successfully, but these errors were encountered: