How do I share global variables across modules - python

Question

How do I share global variables across modules in python?

Answer 1

The best way to share global variables across modules across a single program is to create a config module. Just import the config module in all modules of your application; the module then becomes available as a global name.

config.py

x = 0

mod.py:

import config
config.x = 1

main.py:

import config
import mod
print(config.x)

Hope it works!!

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Thanks!

Answer 2

Global variables can be used by everyone, both inside of functions and outside.

1. Create a variable outside of a function, and use it inside the function. ...
2. Create a variable inside a function, with the same name as the global variable. ...
3. If you use the global keyword, the variable belongs to the global scope:

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Answer 3

The canonical way to share information across modules within a single program is to create a special module (often called config or cfg). Just import the config module in all modules of your application; the module then becomes available as a global name. Because there is only one instance of each module, any changes made to the module object get reflected everywhere. For example:

config.py:

x = 0   # Default value of the 'x' configuration setting

mod.py:

import config
config.x = 1

main.py:

import config
import mod
print(config.x)

Note that using a module is also the basis for implementing the Singleton design pattern, for the same reason.

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