Python: How can I use variable from main file in module?

Question

I have 2 files main.py and irc.py.
main.py

import irc
var = 1
func()

irc.py

def func():
    print var

Answer 1

Two options.

from main import var

def func():
    print var

This will copy a reference to the original name to the importing module.

import main

def func():
    print main.var

This will let you use the variable from the other module, and allow you to change it if desired.

Answer 2

Well, that's my code which works fine:

func.py:

import __main__
def func():
    print(__main__.var)

main.py:

from func import func

var="It works!"
func()
var="Now it changes!"
func()

Answer 3

Don't. Pass it in. Try and keep your code as decoupled as possible: one module should not rely on the inner workings of the other. Instead, try and expose as little as possible. In this way, you'll protect yourself from having to change the world every time you want to make things behave a little different.

main.py

import irc
var = 1
func(var)

irc.py

def func(var):
    print var

Answer 4

Well, var in the function isn't declared. You could pass it as an argument. main.py

import irc
var = 1
func(var)

irc.py

def func(str):
    print str