numpy库简单使用

import numpy as np
    with open(filename, 'r', encoding='utf-8', errors='ignore') as rf:
        number = rf.readlines()
        number = list(map(int, number))
        mx = max(number)
        mn = min(number)
        # 均值
        ag = np.mean(number)

        # 方差（计算样本方差，总体方差ddof保持默然即可）
        fc = np.var(number,ddof=1)

        # 标准差
        bc = np.std(number)