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

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