Importing variables from another file?


How can I import variables from one file to another?

example: file1 has the variables x1 and x2 how to pass them to file2?

How can I import all of the variables from one to another?

Asked By: Some kid



Import file1 inside file2:

To import all variables from file1 without flooding file2’s namespace, use:

import file1

#now use file1.x1, file2.x2, ... to access those variables

To import all variables from file1 to file2’s namespace( not recommended):

from file1 import *
#now use x1, x2..

From the docs:

While it is valid to use from module import * at module level it is
usually a bad idea. For one, this loses an important property Python
otherwise has — you can know where each toplevel name is defined by a
simple “search” function in your favourite editor. You also open
yourself to trouble in the future, if some module grows additional
functions or classes.

Answered By: Ashwini Chaudhary
from file1 import *  

will import all objects and methods in file1

Answered By: ennuikiller

Best to import x1 and x2 explicitly:

from file1 import x1, x2

This allows you to avoid unnecessary namespace conflicts with variables and functions from file1 while working in file2.

But if you really want, you can import all the variables:

from file1 import * 
Answered By: Chris Redford

Actually this is not really the same to import a variable with:

from file1 import x1


import file1

Altough at import time x1 and file1.x1 have the same value, they are not the same variables. For instance, call a function in file1 that modifies x1 and then try to print the variable from the main file: you will not see the modified value.

Answered By: Marc Rechté

Marc response is correct. Actually, you can print the memory address for the variables print(hex(id(libvar)) and you can see the addresses are different.

libvar = None
def lib_method():
    global libvar

from mylib import libvar, lib_method
import mylib

Answered By: Lei Z

title="Hello world" is where we using script1 variable

Method 1:

import script1

Method 2:

from script1 import title
Answered By: Ravi


import first

The result will be 5.

Answered By: 陳仲肯
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