'''
Draft a python script to solve the following questions. thanks

# Requirement
Please use recursion to define and test a function to calculate the sum of a list of numbers.

# procedure
- let's think it step by step
- leave me comment with your code
- solve with recursion
- write your code in `def list_sum_Recur(num_list):` , with comment `# implementation here`
- write a sample function to use it, with comment `# test here`
'''

import sys
sys.setrecursionlimit(999999)

def list_sum_Recur(num_list):
    # implementation here
    if len(num_list) == 1:
        return num_list[0]
    else:
        return num_list[0] + list_sum_Recur(num_list[1:])

# test here
def test_list_sum_Recur():
    print(list_sum_Recur([1, 2, 3, 4, 5]))
    print( (1+5)*5 / 2)

    print(list_sum_Recur(list(range(1,9999+1))))
    print( (1+9999)*9999 / 2)

test_list_sum_Recur()