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I need to run calc(a,b) 10 times but after the first iteration, I want to pass it's output which is a tuple as a parameter.

def test(a,b, count = 1):
    if count == 10:
        return
    cr = calc(a,b)
    return test(cr[0],cr[1], count+1)

print(test(10,4)) returns None

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  • 2
    In the base case, return means return None, and this returned value is propagated to the original caller. Commented Feb 16, 2018 at 5:24
  • What do you want test(10,4) to return? And please give the definition of calc also, so that your question becomes Minimal, Complete, and Verifiable - stackoverflow.com/help/mcve Commented Feb 16, 2018 at 5:37

1 Answer 1

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It returns none because you are not returning anything add, return cr, also ensure you define cr before you attempt to return it

def test(a,b, count = 1):
    cr = calc(a,b)
    if count == 10:
        return cr
    return test(cr[0],cr[1], count+1)
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