一、Python系列——函数的应用之名片管理系统

 card_list = []

 def main_desk():
     print('*'*50)
     print('欢迎使用【名片管理系统】V1.0')
     print('1.新建名片')
     print('2.显示全部')
     print('3.查询名片')
     print('0.退出系统')
     print('*'*50)

 def new_card():
     print('新建名片')
     print('='*50)
     name_str = input('姓名：')
     age_str = input('年龄：')
     phone_str = input('电话：')
     card_dict = {'name': name_str, 'age': age_str, 'phone': phone_str}
     card_list.append(card_dict)
     print(card_dict)
     print(f'添加{name_str}名片成功')

 def show_all():
     print('显示全部名片')
     print('=' * 50)
     if len(card_list) == 0:
         print('名片为空，请先新建名片')
         return
     print('姓名\t\t年龄\t\t电话')
     for card_dict in card_list:
         print(f'{card_dict["name"]}\t\t{card_dict["age"]}\t\t{card_dict["phone"]}')

 def search_card():
     print('查询名片')
     find_name = input('请输入查找的姓名：')
     for card_dict in card_list:
         if card_dict['name'] == find_name:
             print('='*50)
             print('姓名\t\t年龄\t\t电话')
             print(f'{card_dict["name"]}\t\t{card_dict["age"]}\t\t{card_dict["phone"]}')
             deal_card(card_dict)
             break
     else:
         print('名片不存在，请重新输入')

 def deal_card(find_dict):
     action = input('请输入操作：【1】修改【2】删除【0】返回菜单:')
     if action == '':
         find_dict['name'] = work(find_dict['name'], '姓名：')
         find_dict['age'] = work(find_dict['age'], '年龄：')
         find_dict['phone'] = work(find_dict['phone'], '电话：')
         print('修改名片成功')
     elif action == '':
         card_list.remove(find_dict)
         print('删除成功')

 def work(dict_value, message):
     result_str = input(message)
     if len(result_str) > 0:
         return result_str
     else:
         return dict_value

 while True:
     main_desk()
     action_str = input('请输入您的操作：')
     print(f'您的操作是【{action_str}】')
     if action_str == '':
         new_card()
     elif action_str == '':
         show_all()
     elif action_str == '':
         search_card()
         pass
     elif action_str == '':
         print('欢迎您再次使用【名片管理系统】')
         break
     else:
         print('您的输入有误，请重新输入操作')