现在这行不通，请参阅https://github.com/pydata/pandas/issues/2578，
但是您可以通过这种方式完成所需的操作。这是一个非常便宜的操作，因为不会复制任何内容。
In [18]: x = pf.transpose(2,0,1)In [19]: xOut[19]: <class 'pandas.core.panel.Panel'>Dimensions: 4 (items) x 3 (major_axis) x 100 (minor_axis)Items axis: A to DMajor_axis axis: df1 to df3Minor_axis axis: 2013-01-01 00:00:00 to 2013-04-10 00:00:00In [20]: x['E'] = new_dfIn [21]: x.transpose(1,2,0)Out[21]: <class 'pandas.core.panel.Panel'>Dimensions: 3 (items) x 100 (major_axis) x 5 (minor_axis)Items axis: df1 to df3Major_axis axis: 2013-01-01 00:00:00 to 2013-04-10 00:00:00Minor_axis axis: A to E
