python实现名片管理系统的实例代码

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 os
card_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")