Hamming Weight of a Codeword

Problem

Return the Hamming weight of a bit list, which is the number of entries equal to 1. The input is a list of 0/1 integers. Return 0 for an empty list.

Hint

Iterate once and count the bits that are equal to 1.

case 1

in: [[1,0,1,1]]

expected: 3

case 2

in: [[]]

expected: 0

case 3

in: [[0,0]]

expected: 0

case 4

in: [[1,1]]

expected: 2

case 5

in: [[0,1,0,1,0]]

expected: 2

Starter codePython

def hamming_weight(bits):
    # Your code here
    pass

5 test cases · run your code against them in the editor