Question

I have two python files. From python file #1, I want to check to see if there is a certain global variable defined in python file #2.

What is the best way to do this?

Answer 1

try:
    from file import varName
except ImportError:
    print 'var not found'

Alternatively you could do this (if you already imported the file):

import file
# ...
try:
    v = file.varName
except AttributeError:
    print 'var not found'

This will work only if the var is global. If you are after scoped variables, you’ll need to use introspection.