http://stackoverflow.com/questions/23756711/pandas-panel-copy-versus-view
[55] is a view, so is_copy
should be set (and is not)
In [53]: p = tm.makePanel()
In [54]: df = p.iloc[0]
In [55]: df[:] = 0
In [56]: (df.values.ravel()==0).all()
Out[56]: True
In [57]: (p.iloc[0].values.ravel()==0).all()
Out[57]: True
Comment From: jreback
closing as Panel deprecated