Testing if a list exist

Aahz Maruch aahz at panix.com
Thu Dec 21 10:36:11 EST 2000

In article <3A421FA8.61A49D48 at hotmail.com>,
joonas  <keisari_ at hotmail.com> wrote:
>How can I test if a list exists or not.

Based on the code you're using, it seems more that you're trying to test
whether a variable of a specific name exists, rather than testing to see
whether that variable contains a list.  I'd recommend setting the value
of the variable to None before you want to start using it; later on, you
can just say

if foo:

and go on from there.  That's assuming foo will only contain a list; if
it might contain something other than a list, use the types module or code
like this:

if type(foo) == type([]):
                      --- Aahz (Copyright 2000 by aahz at pobox.com)

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