Global variables in Python: save local variable from function call to call

There are several ways to implement this behavior.

Global variables

The first thing that comes to mind is using global variables.
It's important to note that global variables are readable

def func1():    print(x)x = 10func1()   # 10

but simple write access is not allowed:

def func2():    y = 20    # creates a local variable, not modifies the global oney = 10func2()print(y)