Lifetime & Scope

There are 3 scopes
Local - refers to the local objects available in the current function
Global - refers to global objects available throughout the code execution
Module - refers to global objects of the current module

declaring a variable as global will give it global scope

def myfunc() : 
   global _var 
   _var = 'better'  

global keyword

temp = 10                  # global variable 
def func(): 
    temp = 20              # local variable 
    print(temp)            # output 10 
func()                     # output 20 
print(temp)                # output 10 

This can be changed using the global keyword

temp = 10     # global variable 
def func(): 
    global temp = 20       # local variable 
    print(temp)            # output 10 
func()                     # output 20 
print(temp)                # output 20