Python實現簡易通訊錄（修改版）

描述：

上一篇博客我寫了一個簡單的通訊錄，但是還是覺得不夠完美：

• 需要輸入ID，雖然ID是主鍵，但是沒有實現自增功能；

• 忘記加電話號碼了；

• 如果插入用戶名相同，則後續的查、改、刪功能受到影響；

所以，我這個修改版主要修正了以上三點缺陷。具體如下

• 將用戶ID設置爲自增字段，即就是不用輸入ID，程序會自動幫你將插入的用戶進行排序並附上ID，默認從1開始；SQLite實現主鍵自增功能，請查看SQLiteAUTOINCREMENT/自動遞增這篇博客。
• 創建表時增加了電話號碼字段；
• 插入的用戶名不能重複；

好了，廢話不多說，附上新代碼，哈哈~~~

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

import sqlite3
#打開本地數據庫用於存儲用戶信息
conn = sqlite3.connect('mysql_person.db')

#在該數據庫下創建表,創建表的這段代碼在第一次執行後需要註釋掉，否則再次執行程序會一直提示：該表已存在
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";

#增加用戶信息
def insert():
    USER_NAME = raw_input('請輸入用戶暱稱:')
    cursor = conn.execute("SELECT name from MT_table1 where name = '%s';"%USER_NAME)
    for row in cursor:
        if USER_NAME == row[0]:
            print "sorry,改用戶名已存在，請重新輸入用戶名"
            break
    else:
        AGE = input('請輸入年齡:')
        ADDRESS = raw_input('請輸入用戶地址:')
        SALARY = input('請輸入用戶薪水:')
        PhoneNumber = input("請輸入聯繫方式:")
        #爲避免代碼太長，以下我用字符串的連接特性將代碼縮短
        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"

#刪除用戶信息
def delete():
    delete_name = raw_input("請輸入所要刪除的聯繫人姓名:")
    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,不存在該用戶"

#修改用戶信息
def modify():
    update_name = raw_input("請輸入要修改用戶的姓名:")
    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("請輸入要修改用戶的新地址:")
            New_age = input("請輸入要修改用戶的新年齡:")
            New_salary = input("請輸入要修改用戶的新薪水:")
            New_num = input("輸入要修改用戶的新號碼:")
            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,不存在該用戶信息"


#查詢用戶信息
def search():
    conn = sqlite3.connect('mysql_person.db')
    search_name = raw_input('請輸入要查詢的用戶姓名')
    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,沒有該用戶信息"


#顯示所有用戶信息
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個用戶"%row[0]

def menu():
    print '1.新增聯繫人'
    print '2.刪除聯繫人'
    print '3.修改聯繫人'
    print '4.查詢聯繫人'
    print '5.顯示所有聯繫人'
    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 "輸入的選項不存在，請重新輸入！"
        continue