Product of array except self

product_exclude_itself.py

class Solution:
    def product_exclude_itself(self, nums):
        n = len(nums)
        l = [1]
        r = [1]
        for i in range(n):
            l.append(l[-1] * nums[i])
            r.append(r[-1] * nums[n - i - 1])
        return [l[i] * r[n - i - 1] for i in range(n)]
      
Solution().product_exclude_itself([1, 2, 3]) # [2*3, 1*3, 1*2] => [6, 3, 2]