由Python编写的MySQL管理工具

import pymysql
import pandas as pd
from tkinter import Label,StringVar,Entry,Tk,Button
from tkinter.simpledialog import askstring
def Entry_address():                                                #输入数据库地址
    root=Tk()
    l1=Label(root,text='服务器：').grid(column=0,row=0)
    text1=StringVar()
    Entry(root,textvariable=text1).grid(column=1,row=0)
    l2=Label(root,text='用户名：').grid(column=0,row=1)
    text2=StringVar()
    Entry(root,textvariable=text2).grid(column=1,row=1)
    l3 = Label(root, text='密码').grid(column=0, row=2)
    text3 = StringVar()
    Entry(root, textvariable=text3,show='*').grid(column=1, row=2)
    l4 = Label(root, text='数据库').grid(column=0, row=3)
    text4 = StringVar()
    Entry(root, textvariable=text4).grid(column=1, row=3)
    Button(root,text='确定',command=lambda:root.destroy()).grid(column=1,row=4)
    root.mainloop()
    return text1.get(),text2.get(),text3.get(),text4.get()
def connect_database():                                             #连接数据库
    h,u,p,d=Entry_address()
    connect = pymysql.connect(host=h, user=u, password=p, db=d)
    cursor = connect.cursor(cursor=pymysql.cursors.DictCursor)
    return cursor
def select_data():                                                  #操作数据
    cursor=connect_database()
    # query='insert into person (fname,lname) values(%s,%s)'
    # values=('lu','Cachy')##元组只能存储单一数据类型
    # cursor.execute(query,values)
    root1=Tk()
    root1.withdraw()
    query=askstring('hello','输入SQL语句')
    root1.destroy()
    root1.mainloop()
    cursor.execute(query)
    cursor.connection.commit()                                      #获取权限
    a = cursor.fetchall()                                           #从游标中取出数据
    cursor.close()
    c=pd.DataFrame(a)
    print(c)
if __name__=='__main__':
    select_data()