how to use same variable in different functions in python code example

Example 1: python variable scope

a = 5

def f1():
  a = 2
  print(a)
  
print(a)   # Will print 5
f1()       # Will print 2

Example 2: how do variables work in python

#Set a variable equal to something
variable = 0
#This adds 1 to the variable
variable += 1 
#This will print 1
print(variable)