說實(shí)話，第一次寫這么長的Python代碼，期間遇到了很多問題，但是，最終還是完成了，花了我一天半的時間。

該程序?qū)崿F(xiàn)了用戶的增，刪，改，查，主要用到sqlite3模塊。對于該模塊的知識點(diǎn)，請查看我的另一篇文章SQLite-Python

如有更好的建議，請私信，本人將不勝榮幸，讓我們一起來學(xué)習(xí)Python！

#-*- coding:utf-8 -*-import sqlite3#打開本地?cái)?shù)據(jù)庫用于存儲用戶信息conn = sqlite3.connect('mysql_person.db')#在該數(shù)據(jù)庫下創(chuàng)建表，創(chuàng)建表的這段代碼在第一次執(zhí)行后需要注釋掉，否則再次執(zhí)行程序會一直提示：該表已存在conn.execute('''CREATE TABLE MT  (ID INT PRIMARY KEY  NOT NULL,  NAME   TEXT NOT NULL,  AGE   INT  NOT NULL,  ADDRESS  CHAR(50),  SALARY   REAL);''')print "Table created successfully";conn.close()#增加用戶信息def insert(): ID = input('請輸入用戶ID:/n') NAME = raw_input('請輸入用戶昵稱:/n') AGE = input('請輸入年齡:/n') ADDRESS = raw_input('請輸入用戶地址:/n') SALARY = input('請輸入用戶薪水:/n') sql1 = 'insert into MT(ID,NAME,AGE,ADDRESS,SALARY)' sql1 += 'values("%d","%s","%d","%s","%d");'%(ID,NAME,AGE,ADDRESS,SALARY) conn.execute(sql1) conn.commit() print "Records insert successfully"#刪除用戶信息def delete(): name = raw_input("請輸入所要刪除的聯(lián)系人姓名:") cursor = conn.execute("SELECT name from MT where name = '%s';"%name) for row in cursor:  if name == row[0]:   conn.execute("DELETE from MT where name = '%s';"%name)   conn.commit()   print "Records delete successfully"   break else:  print "sorry,不存在該用戶"#修改用戶信息def modify(): name = raw_input("請輸入要修改用戶的姓名:") print search() sql4 = "SELECT id, name, age,address, salary from MT where name = '%s';"%name cursor = conn.execute(sql4) x = raw_input("請輸入要修改用戶的新地址:") y = input("請輸入要修改用戶的新年齡:") z = input("請輸入要修改用戶的新薪水:") sql3 = "UPDATE MT set address = '%s',age = '%d',/  salary = '%d' where name = '%s';"%(x,y,z,name) conn.execute(sql3) conn.commit() print "修改成功" sql5 = "SELECT id, name, age,address, salary from MT where name = '%s';"%name cursor = conn.execute(sql5) for row in cursor:  print "ID = ", row[0]  print "NAME = ", row[1]  print "AGE = ",row[2]  print "ADDRESS = ", row[3]  print "SALARY = ", row[4], "/n"#查詢用戶信息conn = sqlite3.connect('mysql_person.db')def search(): conn = sqlite3.connect('mysql_person.db') name = raw_input('請輸入要查詢的用戶姓名') sql2 = "SELECT id,name,age, address, salary from MT where name= '%s';" % (name) cursor = conn.execute(sql2) for row in cursor:  print "ID = ", row[0]  print "NAME = ", row[1]  print "AGE = ",row[2]  print "ADDRESS = ", row[3]  print "SALARY = ", row[4], "/n"  break else:  print "sorry,沒有該用戶信息"#顯示所有用戶信息def showall(): cursor = conn.execute("SELECT id, age, name, address, salary from MT") for row in cursor:  print "ID = ", row[0]  print "NAME = ", row[1]  print "AGE = ",row[2]  print "ADDRESS = ", row[3]  print "SALARY = ", row[4], "/n" print "Operation done successfully"; cursor = conn.execute("select count(*) from MT;") for row in cursor:  print "一共有%d個用戶"%row[0]def menu(): print '1.新增聯(lián)系人' print '2.刪除聯(lián)系人' print '3.修改聯(lián)系人' print '4.查詢聯(lián)系人' print '5.顯示所有聯(lián)系人' print '6.退出程序' print 'What do you want to do?'while True: menu() x = raw_input('請輸入您的選擇菜單號:') if x == '1':  insert()  continue if x == '2':  delete()  continue if x == '3':  modify()  continue if x == '4':  search()  continue if x == '5':  showall()  continue if x == '6':  print "謝謝使用！"  exit()  continue else:  print "輸入的選項(xiàng)不存在，請重新輸入！"  continue