arrays - sum two lists element-by-element in python recursively -

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this question has answer here:

is possible recursively sum 2 lists element element , return new list?

def sumlistelements(listone, listtwo):     list = []     = 0     while < len(listone):         list.append(listone[i] + listtwo[i])         += 1     return list

so,

a = [1, 2, 3] b = [3, 4, 5]

results

r = [4, 6, 8]

here recursive implementation

def recursive_sum(l1, l2, idx = 0):     if idx < min(len(l1), len(l2)):         return [l1[idx] + l2[idx]] + recursive_sum(l1, l2, idx + 1)     else:         return []  print recursive_sum([1, 2, 3], [4, 5, 6]) # [5, 7, 9]

or

def recursive_sum(l1, l2, result = none, idx = 0):     if result none:         result = []     if idx < min(len(l1), len(l2)):         result.append(l1[idx] + l2[idx])         return recursive_sum(l1, l2, result, idx + 1)     else:         return result

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