这是一个计算均值的例子

import numpy as np


def average(data):
    return sum(data) / len(data)


def bootstrap(data, B, c, func):
    """
    计算bootstrap置信区间
    :param data: array 保存样本数据
    :param B: 抽样次数 通常B>=1000
    :param c: 置信水平
    :param func: 样本估计量
    :return: bootstrap置信区间上下限
    """
    array = np.array(data)
    n = 50
    sample_result_arr = []
    for i in range(B):
        index_arr = np.random.randint(0, len(array), size=n) # 随机抽取n个从0到len(array)的值作为下标
        data_sample = array[index_arr] # 选取对应下标的值，返回的是一个数组
        sample_result = func(data_sample)
        sample_result_arr.append(sample_result)

    a = 1 - c
    k1 = int(B * a / 2)# 下界
    k2 = int(B * (1 - a / 2))# 上界
    auc_sample_arr_sorted = sorted(sample_result_arr)
    lower = auc_sample_arr_sorted[k1]
    higher = auc_sample_arr_sorted[k2]

    return lower, higher


if __name__ == '__main__':
    a = range(10000)
    a = [item + 10000 for item in a] # 10000.....20000的整数值
    data = np.array(a)
    result = bootstrap(data, 1000, 0.95, average)
    print(result)