defplot_result(count_df):fig=plt.figure()#useafiguresizeof(20,8),barwidt...

#画图的基本命令import matplotlib.pyplot as pltimport numpy as npx=np.linspace(0...

1. 皮尔森系数 两个变量(X, Y)的皮尔森相关性系数(ρX,Y)等于它们之间的协方差cov(X,Y)除以它们各自标准差的乘积(σX, σY)...

fromsqlalchemyimportcreate_engineimport pandas as pdimport pymysql#Pytho...

# 日期时间字符串st = "2017-11-23 16:10:10"# 当前日期时间dt = datetime.datetime.now()#...