开发者

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

开发者 https://www.devze.com 2023-03-06 14:36 出处:网络
I have 2 files main.py and irc.py. main.py import irc var = 1 func() irc.py def func(): print var When I try to run main.py I\'m getting this error

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

main.py

import irc
var = 1
func()

irc.py

def func():
    print var

When I try to run main.py I'm getting this error

NameError: global name 'var' is not defined

How to make it work?

@Edit

I thought there is a better solution but unfortunately the only one i found is to make another file and import it to both files

main.py

import irc
import another
another.var = 1
irc开发者_开发问答.func()

irc.py

import another
def func():
    print another.var

another.py

var = 0


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


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()


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.


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


What Samir said works for Python 2

For python 3 you need to do it this way.

main.py

import irc
from irc import func

var = 1
func(var)
irc.py

irc.py

def func(var):
    print(var)
0

精彩评论

暂无评论...
验证码 换一张
取 消