product list python code example

Example 1: python multiply list

a_list = [1, 2, 3]

a_list = [item * 2 for item in a_list]

print(a_list)
OUTPUT
[2, 4, 6]

Example 2: python product

#from itertools import product


def product(*args, **kwds):
    # product('ABCD', 'xy') --> Ax Ay Bx By Cx Cy Dx Dy
    # product(range(2), repeat=3) --> 000 001 010 011 100 101 110 111
    pools = map(tuple, args) * kwds.get('repeat', 1)
    result = [[]]
    for pool in pools:
        result = [x+[y] for x in result for y in pool]
    for prod in result:
        yield tuple(prod)