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DataFrame.loc[] loses index name #3880

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joeb1415 opened this issue Jun 13, 2013 · 1 comment · Fixed by #3887
Closed

DataFrame.loc[] loses index name #3880

joeb1415 opened this issue Jun 13, 2013 · 1 comment · Fixed by #3887
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Bug Indexing Related to indexing on series/frames, not to indexes themselves
Milestone
0.12

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@joeb1415
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In [1]: from pandas import DataFrame

In [2]: x = DataFrame([[1, 1], [1, 1]])

In [3]: x.index.name = 'index_name'

In [4]: x.iloc[[0, 1]].index.name
Out[4]: 'index_name'

In [5]: x.loc[[0, 1]].index.name

In [6]: x.loc[[0, 1]].index.name is None
Out[6]: True
@jreback
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jreback commented Jun 13, 2013

a bug....and a bit non-trivial to fix...will see if can get into 0.11.1

@jreback jreback mentioned this issue Jun 13, 2013
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Bug Indexing Related to indexing on series/frames, not to indexes themselves
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Milestone
0.12
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BUG: (GH3880) index names are now propogated with loc/ix jreback/pandas
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@jreback @joeb1415