python求列表均值

以下是三种Python求列表均值的方法：

1.使用Python内置函数sum()和len()求列表均值

numbers = [1, 2, 3, 4, 5]
mean = sum(numbers) / len(numbers)
print(mean) # 输出 3.0

2.使用numpy库求列表均值

import numpy as np

numbers = [1, 2, 3, 4, 5]
mean = np.mean(numbers)
print(mean) # 输出 3.0

3.使用自定义函数求列表均值

def mean(numbers):
    return sum(numbers) / len(numbers)

numbers = [1, 2, 3, 4, 5]
print(mean(numbers)) # 输出 3.0