Check if variable is defined

Courageous jkraska1 at
Thu May 17 20:37:03 EDT 2001

>> I once wondered if vars(), locals() or globals() have a time cost to
>> produce the dictionary in a usable format

I'm too lazy to go over to my Python source tree at the moment,
but I believe that these already _are_ in Python dictionaries, right
inside Python. IOW, they aren't "producing" anything, they are
simply giving you a reference to an already-existing construct.


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