我的任务是创建一个带有逗号分隔的随机数的文件。编写python代码，对它们求和求平均值。该怎么做呢？

import random

with open('random_numbers.txt', 'w') as file:
    numbers = [str(random.randint(1, 100)) for _ in range(10)]  # 生成10个1到100之间的随机数
    file.write(','.join(numbers))  # 将随机数用逗号分隔并写入文件

with open('random_numbers.txt', 'r') as file:
    numbers = file.read().split(',')  # 读取文件中的随机数并按逗号分隔为列表
    numbers = [int(num) for num in numbers]  # 将随机数转换为整数类型
    total = sum(numbers)  # 求和
    average = total / len(numbers)  # 求平均值
    print("随机数之和：", total)
    print("随机数平均值：", average)