How to change a local variable from a sub-function

Question

I have following code:

my_var=1
def a():  
    def b():
        my_var=2
    b()
    return my_var

print(a())

I'm trying to change the variable my_var in sub-function b(). The result should be 2 instead of 1. But in my code, it doesn't work. How can I solve this problem?

You could use `global` or better return the value from the function and assign it to your variable. — Maximilian Peters, Apr 03 '21 at 14:00
oh great thank! I did not know that I also use global in sub-function Thanks! — , Apr 03 '21 at 14:11
Does this answer your question? [Python function global variables?](https://stackoverflow.com/questions/10588317/python-function-global-variables) — Czaporka, Apr 03 '21 at 14:18
Yes, but I was not sure, if it's also for sub-functions. Thanks! — , Apr 03 '21 at 14:27

score 0 · Accepted Answer · answered Apr 03 '21 at 14:10

0

global is the keyword used in python to access the actual variable which is present outside function try out the below code.

my_var=1
def a(): 
    def b():
        global my_var
        my_var = 2
    b()
    return my_var

print(a())

answered Apr 03 '21 at 14:10

Sanjay Kotabagi

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How to change a local variable from a sub-function

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