Question

Hi i am a beginner who is learning Python, i have stumbled across this example in a book and for some reason when i attempt the same code myself i am not receiving the same output? Please help…

def tester(start):
    state = start
    def nested(label):
        nonlocal state
        print(label, state)
        state += 1
    return nested

>>> F = tester(0)
>>> F('spam')
spam 0
>>> F('ham')
ham 1
>>> F('eggs')
eggs 2

My results are not incrementing + 1 each time i run the function, is there something wrong with the book?

Answer 1

Works for me. Are you sure you’re using python 3? nonlocal is a python 3 feature, and will not work in python 2.x.