from tkinter import *from tkinter import messageboxfrom tkinter.filedialog import *import numpy as npimport matplotlib.pyplot as pltimport pandas as pdimport matplotlib.ticker as tickerimport mpl_toolkits.axisartist as AAfrom mpl_toolkits.axisartist.axislines import...【阅读全文】
使用pymysql查询数据库数据,由于数据库表的字段里有datatime类型字段,返回的结果形式如下:datetime.datetime(2019, 3, 19, 10, 6, 6)那么我们对结果进行json.dumps时,会报错:TypeError: Object of type datetime is not JSON serializable此时有三种处理方案一、重写json函数import datetime...【阅读全文】