pydata/pandas — comment on commit 14a58b6a5ff13f9a21451e8b8cd2d9bfcb839f8e
File: pandas/tests/test_frame.py line 3382
By adamklein:

Semantically we're already doing this, but the change is "offset" to "freq". Will need to go through code again. To be clear, we'd want:

def shift(self, periods, offset=None, **kwds):

to instead be

def shift(self, periods, freq=None, **kwds):

And check kwds for offset / timeRule and handle accordingly (as well as printing deprecation warning)