python里如何求两个数的最小公倍数？

利用公式$lcm(a,b)=ab/gcd(a,b)$

from math import gcd
def lcm(a,b): 
    prod = abs(a * b)
    gcd_ab = gcd(a,b)
    if gcd_ab == 0:
        return 0
    return int(prod / gcd_ab)