name = 'alex'

def test01():
    name = 'mike'
    def test02():
        global name
        name = 'lupe'
    test02()
    print(name) # mike
print(name) # alex
test01()
print(name) # lupe

name = 'alex'

def test01():
    name = 'mike'
    def test02():
        nonlocal name
        name = 'lupe'
    test02()
    print(name) # lupe
print(name) # alex
test01()
print(name) # alex