pd.concat nicely preserves name attributes when given a list of series. However, this only works if all series have the name attribute set, otherwise all names are lost:
In [1]: import pandas as pd
In [2]: pd.__version__
Out[2]: '0.16.2'
In [3]: foo = pd.Series([1,2], name='foo')
In [4]: bar = pd.Series([1,2])
In [6]: pd.concat([foo, bar], 1)
Out[6]:
0 1
0 1 1
1 2 2
Not sure this qualifies as a bug.
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