Python Module Initialization Order?

Question

I am a Python newbie coming from a C++ background. While I know it\'s not Pythonic to try to find a matching concept using my old C++ knowledge, I think this question is sti

Answer 1

Python import executes new Python modules from beginning to end. Subsequent imports only result in a copy of the existing reference in sys.modules, even if still in the middle of importing the module due to a circular import. Module attributes ("global variables" are actually at the module scope) that have been initialized before the circular import will exist.

main.py:

import a

a.py:

var1 = 'foo'
import b
var2 = 'bar'

b.py:

import a
print a.var1 # works
print a.var2 # fails