python实现名片管理系统

import cards_tool# 主业务逻辑cards_tool.read_card()  # 1.显示用户主界面while True: cards_tool.show_menu() menu_str = input("请选择执行的操作:") print("您选择的功能:%s" % menu_str) if menu_str == "1":  cards_tool.create_card() elif menu_str == "2":  cards_tool.show_card_all() elif menu_str == "3":  cards_tool.search_card() elif menu_str == "0":  cards_tool.write_card()  break else:  print("输入有误，请重新输入")

import oscard_info_all = [] # 所有名片信息# 名片管理 具体功能def write_card(): """退出系统时，将名片信息保存到文件夹中""" f = open("E://workspace_python//FirstDemo//名片管理系统.txt", "w") f.write(str(card_info_all)) f.close()  def read_card(): """进入系统时，将名片信息加载到内存中""" is_exist = os.path.exists("E://workspace_python//FirstDemo//名片管理系统.txt") if is_exist:  # 文件存在将信息加载到内存中  f = open("E://workspace_python//FirstDemo//名片管理系统.txt","r")  global card_info_all  card_info_all = eval(f.read())  # print(card_info_all)  f.close() else:  # 没有文件创建空文件  f = open("E://workspace_python//FirstDemo//名片管理系统.txt", "w")  f.close() print(is_exist)  def show_menu(): """主菜单页面展示""" print("*"*30) print("欢迎使用[命名管理系统] v1.0") print() print("1.新建名片") print("2.显示全部") print("3.查询名片") print() print("0.退出系统") print("*"*30)  def create_card(): """新建名片""" print("功能：新建名片") name = input("请输入姓名:") phone = input("请输入电话:") qq = input("请输入qq号:") email = input("请输入邮箱:") card_info = {"name":name,"phone":phone, "qq":qq, "email":email} card_info_all.append(card_info) print("添加%s的名片成功" % name)  def show_card_all(): """显示所有名片""" print("功能：显示全部") if not len(card_info_all):  print("没有任何名片")  return print("name".ljust(14),"phone".ljust(14),"qq".ljust(14),"email".ljust(14),sep="") print("-"*56) for card in card_info_all:  print(card["name"].ljust(14),card["phone"].ljust(14),card["qq"].ljust(14),card["email"].ljust(14),sep="")  print("-"*56)  def search_card(): """查询名片""" print("功能：查询名片") name = input("请输入查询的姓名:") for card in card_info_all:  if name == card["name"]:   print("name".ljust(14), "phone".ljust(14), "qq".ljust(14), "email".ljust(14), sep="")   print("-" * 56)   print(card["name"].ljust(14), card["phone"].ljust(14), card["qq"].ljust(14), card["email"].ljust(14),sep="")   # 名片高级处理   set_card(card)   break; else:  print("没有找到%s" % name)  def set_card(card): """名片的高级设置""" while True:  menu = input("请输入对名片的操作：1.修改/ 2.删除/ 0.返回上一级")  if menu == "1":   name = input("请输入姓名:")   phone = input("请输入电话:")   qq = input("请输入qq号:")   email = input("请输入邮箱:")   card["name"] = name   card["phone"] = phone   card["qq"] = qq   card["email"] = email   print("%s 的名片修改成功" % name)   return  elif menu == "2":   card_info_all.remove(card)   print("删除名片成功")   return  elif menu == "0":   return  else:   print("输入有误，请重新输入")