Loss of series name attributes in pd.concat

[multiloc]

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.

[jreback]

hmm, so you want

In [14]: DataFrame({'foo' : [1,2], 1 : [1,2]},columns=['foo',1])
Out[14]: 
   foo  1
0    1  1
1    2  2

seems reasonable. I'll mark it as a bug. pull-requests welcome!

[multiloc]

yep, that's it.

[jreback]

gr8. pull-requests welcome!

[IamGianluca]

@jreback Do you have any comment on the last pull request? I fixed all unit tests which were previously failing.