Xemacs Python Mode.

[Barry A. Warsaw]

>>>>> "SM" == Skip Montanaro <skip at mojam.com> writes:

    SM> In fact, maybe Emacs' tabify command will just do the right
    SM> thing if you have tab-width set properly.  Try C-h f tabify
    SM> RET.

M-x tabify should do it unless you have different indentation levels
(some with equiv 4 spaces, some with equiv 8 spaces).  In that case,
tho' I haven't tried it, I'm guessing Gordon's tabcleaner.py should do 
the trick nicely.

ftp://ftp.python.org/pub/python/contrib/All/tabcleaner.py

-Barry