Python面向对象名片管理系统实现：基于文件存储的开发示例

名片类与管理类代码实现

#定义名片类
class Card(object):
 def __init__(self,name,phone,QQ,Email):
  self.name=name
  self.phone=phone
  self.QQ=QQ
  self.Email=Email

 def __str__(self):
  return f"{self.name},{self.phone},{self.QQ},{self.Email}"
#定义名片管理类
class Card_mannager(object):
 def __init__(self):
  self.card_list=[]
#新建名片
 def new_card(self):
  name=input("请输入姓名：")
  phone=input("请输入电话：")
  QQ=input("请输入QQ：")
  Email=input("请输入Email：")
  card=Card(name,phone,QQ,Email)
  self.card_list.append(card)
#显示名片
 def show_card(self):
  if len(self.card_list)>0:
   print("所以名片信息如下：")
   print("")
   for i in self.card_list:
    print("姓名:"+i.name,"电话:"+i.phone,"QQ:"+i.QQ,"Email:"+i.Email)
  else:
   print("没有该联系人信息！")
 #查找名片
 def search_card(self):
  name=input("请输入你要查找的姓名：")
  for i in self.card_list:
   if i.name==name:
    print("查找成功！")
    print("姓名:"+i.name,"电话:"+i.phone,"QQ:"+i.QQ,"Email:"+i.Email)
    print(" ")
    print("-"*80)
    print("1:删除")
    print("2:修改")
    print("0:返回上一级菜单")
    action=int(input("请选择操作功能:"))
    while True:
     if action == 1:
      self.card_list.remove(i)
      self.save_card()
      print("删除成功！")
      break
     elif action==2:
      i.name=input("请输入姓名：")
      i.phone=input("请输入电话：")
      i.QQ=input("请输入QQ：")
      i.Email=input("请输入Email:")
      self.save_card()
      print("修改成功！")
      break
     elif action==0:
      break
     else:
      print("输入有误，请重新输入！")
      break
    break
  else:
   print("没有该联系人信息！")
#保存名片
 def save_card(self):
  flie = open("data.data","w")
  cardlist=[i.__dict__ for i in self.card_list]
  flie.write(str(cardlist))
  flie.close()
#加载名片
 def load_card(self):
  try:
   flie = open("data.data","r")
  except:
   flie = open("data.data","w")
  else:
   data=eval(flie.read())
   if len(data)>0:
    for i in data:
     card=Card(i["name"],i["phone"],i["QQ"],i["Email"])
     self.card_list.append(card)
  finally:
   flie.close()
#菜单
 @staticmethod
 def show_menu():
  print("*"*80)
  print("欢迎使用【名片管理系统】V2.0")
  print()
  print("1.新建名片")
  print("2.显示全部名片")
  print("3.查询名片")
  print()
  print("0.退出系统")
  print("*"*80)

 def run(self):
  self.load_card()
  while True:
   self.show_menu()
   action=int(input("请选择操作功能："))
   print("您的选择是：{0}".format(action))
   if action==1:
    self.new_card()
    self.save_card()
    print("添加成功！")
   elif action==2:
    self.show_card()
   elif action==3:
    self.search_card()
   elif action==0:
    print("欢迎再次使用！")
    break
   else:
    print("输入有误，请重新输入！")

if __name__=="__main__":
 A=Card_mannager()
 A.run()