# local, nonlocal, global scope

def scope_test():
    def do_local(): # nested function --- only available inside scope_test()
        spam = "local spam"
    def do_nonlocal():
        nonlocal spam
        spam = "nonlocal spam"
    def do_global():
        global spam
        spam = "global spam"
    spam = "test spam"
    do_local()
    print("After local assignment:", spam)
    do_nonlocal()
    print("After nonlocal assignment:", spam)
    do_global()
    print("After global assignment:", spam)

scope_test()
print("In global scope:", spam)

# first parameter in method is self-reference

class Foo:
    def add_three(n): # confusing...
        return n + 3