Python recursion returns None

Question

This will be really funny... Given following python codes:

def getBinary(binaryInput, kSize, beginBit):
    if int(binaryInput[beginBit + kSize-1])=         


        

Answer 1

When a function ends without executing a return statement, it returns None. Instead of

getBinary(binaryInput, kSize, beginBit)

you mean

return getBinary(binaryInput, kSize, beginBit)