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ReturnConsistentTupleSizes.py

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def sum_length_product1(l):

if l == []:

return 0, 0 # this tuple has the wrong length

else:

val = l[0]

restsum, restlength, restproduct = sum_length_product1(l[1:])

return restsum + val, restlength + 1, restproduct * val

def sum_length_product2(l):

if l == []:

return 0, 0, 1 # this tuple has the correct length

else:

val = l[0]

restsum, restlength, restproduct = sum_length_product2(l[1:])

return restsum + val, restlength + 1, restproduct * val