Fixed parmeters before the others

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examples/functions/super.py

def mysum(op, *numbers):
    print(numbers)
    if op == '+':
        total = 0
    elif op == '*':
        total = 1
    else:
        raise Exception('invalid operator {}'.format(op))

    for s in numbers:
        if op == '+':
            total += s
        elif op == '*':
            total *= s

    return total

print(mysum('+', 1))
print(mysum('+', 1, 2))
print(mysum('+', 1, 1, 1))
print(mysum('*', 1, 1, 1))

(1,)
1
(1, 2)
3
(1, 1, 1)
3
(1, 1, 1)
1