名片信息管理系统（初稿）

#!/usr/bin/python
# -*- coding: UTF-8-*-
#----author:valecalida----
import sys


def display():
    print("----------Business Card Management System----------")
    print("\t\t1.添加一个新的名片")
    print("\t\t2.删除一个名片")
    print("\t\t3.修改一个名片")
    print("\t\t4.查询一个名片")
    print("\t\t5.显示所有的名片")
    print("\t\t6.退出系统\n")


def insert():
    user_name = input("Please enter a name :")
    QQ_ID = int(input("Please enter the QQ id :"))
    address = input("Please enter the address :")

    card = {}
    card['Name'] = user_name
    card['QQ'] = QQ_ID
    card['Address'] = address

    Card_info.append(card)
    print("You have insert a piece of info.\n")


def delete():
    del_all = input("Enter 'All' to clear all info or enter 'Name' to delete info by name.")
    if del_all == 'All':
        Card_info.clear()
    else:
        del_enter = input("Enter the name you want to clear:")
        for info in Card_info:
            if del_enter == info['Name']:
                Card_info.remove(info)


def change():
    chan_input = input("Whose info would you like to change?enter the name:")
    for info in Card_info:
        if chan_input == info['Name']:
            new_user_name = input("Please enter a name :")
            new_qq_id = int(input("Please enter the QQ id :"))
            new_address = input("Please enter the address :")

            info['Name'] = new_user_name
            info['QQ'] = new_qq_id
            info['Address'] = new_address


def find_all():
    user_find = input("Please enter the name you want to find: ")
    for card_info in Card_info:
        if card_info['Name'] == user_find:
            show = input("You find the info of " + user_find + ".  " + "Do you want to show it?[y]/[n]")
            new_car = card_info
            if show == 'y':
                for key,value in new_car.items():
                    print (key + ":" + str(value))
                break
            else:
                pass
    else:
        print("There is no person called " + user_find + ".")


def show_all():
    if Card_info:
        for info in Card_info:
            new_car = info
            for key, value in new_car.items():
                print (key + ":" + str(value) + "\n")

    else:
        print("There is no info.")
user = {

    'vale':'123456',
    'calida':'123123',
    'arnyek':'521000'
}


Card_info = []


user_input = str(input("Please enter your name: "))
pass_input = str(input("Please enter your password: "))
while user_input in user and pass_input == user.get(user_input):
    print("Welcome ,master.")
    user_input_again = input("Whether continue or not? [y]/[n]/[q]")
    if user_input_again == 'y':
        while True:
            display()
            user_choice = input("请选择您要进行的操作：")
            if user_choice == '1':
                insert()
            elif user_choice == '2':
                delete()
            elif user_choice == '3':
                change()
            elif user_choice == '4':
                find_all()
            elif user_choice == '5':
                show_all()
            else:
                sys.exit()
    elif user_input_again == 'n':
        pass
    else:
        break

else:
    print("You got a wrong username or password,please try it later.")
##完善后追发