My Solution

product_except_self.py

class Solution:
    def productExceptSelf(self, nums):
        output = []
        product = 1
        for index in range(len(nums)):
            product = 1 if index == 0 else product * nums[index-1]
            output.append(product)
        
        product = 1
        for index in range(len(nums)-1, -1, -1):
            product = 1 if len(nums)-1 == index else nums[index+1] * product
            output[index] = product * output[index]
        return output