Panel arguments can no longer be named.

[etyurin]

This code used to work some time around version 0.10, but now generates a ValueError:

In [14]: y
Out[14]:
<class 'pandas.core.panel.Panel'>
Dimensions: 2 (items) x 3 (major_axis) x 2 (minor_axis)
Items axis: z1 to z2
Major_axis axis: 0 to 2
Minor_axis axis: a to b

In [15]: y.transpose('minor', 'major', 'items')
Out[15]:
<class 'pandas.core.panel.Panel'>
Dimensions: 2 (items) x 3 (major_axis) x 2 (minor_axis)
Items axis: a to b
Major_axis axis: 0 to 2
Minor_axis axis: z1 to z2

In [16]: y.transpose( items='minor', major='major', minor='items')

ValueError Traceback (most recent call last)
in ()
----> 1 y.transpose( items='minor', major='major', minor='items')

/usr/local/lib/python2.7/dist-packages/pandas-0.12.0.dev_be25266-py2.7-linux-x86_64.egg/pandas/core/panel.pyc in transpose(self, _args, *_kwargs)
1176 except (IndexError):
1177 raise ValueError(
-> 1178 "not enough arguments specified to transpose!")
1179
1180 axes = [self._get_axis_number(kwargs[a]) for a in self._AXIS_ORDERS]

ValueError: not enough arguments specified to transpose!

[jreback]

try

y.transpose(items='minor',major_axis='major',minor_axis='items')

minor and major are axis aliases but don't allow them here...let me take a look

[cpcloud]

@jreback passing only kwargs will fail here because args will be an empty list thus raising an IndexError. use of args and kwargs here seems like a bad idea since you already know precisely how many and the names of the axes. why not just have named arguments here? if they must be kept you can just assert args or kwargs and len(args) + len(kwargs) == 3 and then the code should work.

[jreback]

his is an easy fix
it just needs to accept the aliases
I'll fix tom (I had meant to keep the API the same)

[cpcloud]

@jreback I have a pr ready for this, should i submit?

[jreback]

oh if u have I ahead
I'll take a look

[jreback]

closed by #3558

@etyurin thanks for the report