Python实现简易通讯录（修改版）

版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/MTbaby/article/details/59105813

描述：

上一篇博客我写了一个简单的通讯录，但是还是觉得不够完美：

• 需要输入ID，虽然ID是主键，但是没有实现自增功能；

• 忘记加电话号码了；

• 如果插入用户名相同，则后续的查、改、删功能受到影响；

所以，我这个修改版主要修正了以上三点缺陷。具体如下

• 将用户ID设置为自增字段，即就是不用输入ID，程序会自动帮你将插入的用户进行排序并附上ID，默认从1开始；SQLite实现主键自增功能，请查看SQLiteAUTOINCREMENT/自动递增这篇博客。
• 创建表时增加了电话号码字段；
• 插入的用户名不能重复；

好了，废话不多说，附上新代码，哈哈~~~

#-*- coding:utf-8 -*-

import sqlite3
#打开本地数据库用于存储用户信息
conn = sqlite3.connect('mysql_person.db')

#在该数据库下创建表,创建表的这段代码在第一次执行后需要注释掉，否则再次执行程序会一直提示：该表已存在
conn.execute ('''CREATE TABLE MT_table1(
   ID INTEGER PRIMARY KEY   AUTOINCREMENT,
   NAME           TEXT      NOT NULL,
   AGE            INT       NOT NULL,
   ADDRESS        CHAR(50),
   SALARY         REAL,
   PhoneNumber    INT        NOT NULL);''')
print "Table created successfully";

#增加用户信息
def insert():
    USER_NAME = raw_input('请输入用户昵称:')
    cursor = conn.execute("SELECT name from MT_table1 where name = '%s';"%USER_NAME)
    for row in cursor:
        if USER_NAME == row[0]:
            print "sorry,改用户名已存在，请重新输入用户名"
            break
    else:
        AGE = input('请输入年龄:')
        ADDRESS = raw_input('请输入用户地址:')
        SALARY = input('请输入用户薪水:')
        PhoneNumber = input("请输入联系方式:")
        #为避免代码太长，以下我用字符串的连接特性将代码缩短
        sql1 = 'INSERT INTO MT_table1(NAME,AGE,ADDRESS,SALARY,PhoneNumber)'
        sql1 += 'VALUES("%s","%d","%s","%d","%d");'%(USER_NAME,AGE,ADDRESS,SALARY,PhoneNumber)
        conn.execute(sql1)
        conn.commit()
        print "Records insert successfully"

#删除用户信息
def delete():
    delete_name = raw_input("请输入所要删除的联系人姓名:")
    cursor = conn.execute("SELECT name from MT_table1 where name = '%s';"%delete_name)
    for row in cursor:
        if delete_name == row[0]:
            conn.execute("DELETE from MT_table1 where name = '%s';"%delete_name)
            conn.commit()
            print "Records delete successfully"
            break
    else:
        print "sorry,不存在该用户"

#修改用户信息
def modify():
    update_name = raw_input("请输入要修改用户的姓名:")
    sql6 = "SELECT  name from MT_table1 where name = '%s';"%update_name
    cursor = conn.execute(sql6)
    for row in cursor:
        if update_name == row[0]:
            New_addr = raw_input("请输入要修改用户的新地址:")
            New_age = input("请输入要修改用户的新年龄:")
            New_salary = input("请输入要修改用户的新薪水:")
            New_num = input("输入要修改用户的新号码:")
            sql3 = "UPDATE MT_table1 set address = '%s',age = '%d',salary = '%d',PhoneNumber = '%d' where \
            name = '%s';"%(New_addr,New_age,New_salary,New_num,update_name)
            conn.execute(sql3)
            conn.commit()
            print "修改成功"
            sql5 = "SELECT id, name, age,address, salary ,PhoneNumber from MT_table1 where name = '%s';"%update_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]
                print "PhoneNumber = ",row[5], "\n"
                break
    else:
        print "sorry,不存在该用户信息"


#查询用户信息
def search():
    conn = sqlite3.connect('mysql_person.db')
    search_name = raw_input('请输入要查询的用户姓名')
    sql2 = "SELECT id,name,age, address, salary ,PhoneNumber from MT_table1 where name= '%s';" % (search_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]
        print "PhoneNumber = ",row[5], "\n"
        break
    else:
        print "sorry,没有该用户信息"


#显示所有用户信息
def showall():
    cursor = conn.execute("SELECT id, name,age, address, salary ,PhoneNumber from MT_table1")
    for row in cursor:
        print "ID = ", row[0]
        print "NAME = ", row[1]
        print "AGE = ",row[2]
        print "ADDRESS = ", row[3]
        print "SALARY = ", row[4]
        print "PhoneNumber = ",row[5], "\n"
    print "Operation done successfully";
    cursor = conn.execute("select count(*) from MT_table1;")
    for row in cursor:
        print "一共有%d个用户"%row[0]

def menu():
    print '1.新增联系人'
    print '2.删除联系人'
    print '3.修改联系人'
    print '4.查询联系人'
    print '5.显示所有联系人'
    print '6.退出程序'
    print 'What do you want to do?'
while True:
    menu()
    x = raw_input('请输入您的选择菜单号:')
    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 "谢谢使用！"
        exit()
        continue
    else:
        print "输入的选项不存在，请重新输入！"
        continue