how does scope work in python code example

Example 1: how does scope work in python

a = 5
b = 3

def f1():
  a = 2
  print(a)
  print(b)
  
print(a)   # Will print 5
f1()       # Will print 2 and 3

Example 2: python variable scope

a = 5

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