def find_k_product(test_list, K):
  def get_product(val) : 
  	res = 1
  	for ele in val: 
  		res *= ele 
  	return res 
  
  res = get_product([sub[K] for sub in test_list])
  return (res) 
def find_k_product(test_list, K):
    def get_product(val):
        res = 1
        _ele_i = 0
        while _ele_i < len(val):
            ele = val[_ele_i]
            res *= ele
           
            _ele_i += 1
        return res
    res = get_product([sub[K] for sub in test_list])
    return res