Checking for an "undefined" variable - newbie question

Dan Rawson daniel.rawson.take!this!out! at asml.nl
Wed Aug 6 12:47:34 CEST 2003


How do I check if a variable has been defined??

The following don't appear to work:

if variable:

if variable is None:


I have only one (ugly) solution:

try:
     variable
except NameError:
     ...

which works, but is a bit clumsy if I just want to know if the thing already exists.

If there's a more elegant way to check this, that would be great!

Thanks . . . .

Dan





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