gistfile1.txt

def with_intern():
    def a():
        return 'foo'
    def b():
        return 'foo'
    return a() is b()
 
print(with_intern()) # True

def with_no_intern():
    def a():
        return 'foo bar'
    def b():
        return 'foo bar'
    return a() is b()

print(with_no_intern()) #False