从另一个文件导入变量以在python中运行

Question

variables.py

path="c:/something"
path2="c:/somethng2"
path3="c:/something3"
....

main.py

def run():
    from variables import *

...

i have such error:

SyntaxError: import * is not allowed in function 'run' because it contains a nested function with free variables

Answer 1

import variables as v
path=v.path

This should do for path variable from other file
Hope this helps!

Answer 2

You should be very careful with global variables. It is considered a better practice to avoid using global variables, updating them in different locations in the code. It should not be a problem if those are only constants, though. Usually I do it this way:

variables.py :

MY_PATH1 ="c:/something"
MY_PATH2 ="c:/somethng2"
MY_PATH3 ="c:/something3"

main.py

from variables import *

def run():
    print(MY_PATH1)
    ...

If you are working with path strings, you may also want to take a look in the documentation for the os.path module. It helps making path descriptors compatible with the different platforms, among other useful things.