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titaniumdecoy · Aug 13th, 2006, 12:00 PM

I understand how the accumulator function works, but how come the curr variable has to be a list? Why doesn't the following work?

def make_acc(start=0):
    """accumulator generator """
    curr = start
    def acc(inc):
        curr += inc
        return curr
    return acc

I get the error "UnboundLocalError: local variable 'curr' referenced before assignment".

Aug 13th, 2006, 12:00 PM	#3
titaniumdecoy Expert Programmer Join Date: Nov 2005 Posts: 856 Rep Power: 3	I understand how the accumulator function works, but how come the curr variable has to be a list? Why doesn't the following work? (Toggle Plain Text) def make_acc(start=0): """accumulator generator """ curr = start def acc(inc): curr += inc return curr return acc def make_acc(start=0): """accumulator generator """ curr = start def acc(inc): curr += inc return curr return acc I get the error "UnboundLocalError: local variable 'curr' referenced before assignment".