ZeroDivisionError: division by zer已经设置了0就不运行。可是为什么在多次运行后还会出现呢？？？全国自学考试python 第5章 第5.1题

import random as ra

# 设置随机数的最小数和最大数
raStart, raEnd = -5, 5

user_input_num = ra.randrange(raStart, raEnd)

# 设置整数
user_infor = 0

# 设置负数
user_neg = 0

# 设置各数之和
user_sum = 0

# aver_num = 0

if user_input_num == 0:
    print("Sorry this program try again, moment")


else:
    while user_input_num != 0:
        user_input_num = ra.randint(raStart, raEnd)
        print(f"Enter an integer, the input ends if it is 0: {user_input_num}")
        if user_input_num > 0:
            user_infor += 1
        elif user_input_num < 0:
            user_neg += 1

        user_sum += user_input_num
        aver_num = round(user_sum / (user_infor + user_neg), 2)
    print(f"""
    tThe number of positives is {user_infor}
    tThe number of negatives is {user_neg}
    tThe total is {user_sum}
    tThe average is {aver_num}
                    """)

我为此写了

if user_input_num == 0:
    print("Sorry this program try again, moment")

但是连续多次后就出现了

我想知道有没有什么解答一下。这个是我点的太多了吗？程序也有物理世界的错误吗？？