sort() doesn't work on dist.keys() ?

Steve Pinard spinard at
Thu Jul 10 22:14:01 CEST 2003

(Got a comm error trying to post first time, sorry if this
is a duplicate)

New to Python, so please bear with me.

>>> import sys
>>> print sys.modules.keys()          # works fine
['code', ...snip... ]
>>> print sys.modules.keys().sort()   # returns None, why?

According to my reference (Nutshell), keys() returns a
"copy" of the dict keys as a list, so I would expect when
I aply sort() to that list, I would get an in-place sorted
version of that list.  Why do I get None?

- Steve

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