Untitled

class Thing:
   def __init__(self, name, cost):
      self.name=name
      self.cost=cost

class Table:
   def init(self, max_size=10):
      self.max_size=max_size
      self.things=[]
   
   def put(self, thing):
      if len(self.things) == self.max_size:
         raise Exception("Слишком много вещей")
      self.things.append(thing)

   def get_by_name(self, thing_name):
      for th in self.things:
         if(th.name==thing_name):
            return th
      return None

   def deleter(self, name):
      th=self.get_by_name(name)
      self.things.remove(th)
        
   def get_by_cost(self, thing_cost):
      for th in self.things:
         if(th.cost==thing_cost):
            return th
      return None
   def get_cost_sum(self):
      return sum(map(lambda th: th.cost, self.things))
vilka = Thing("Vilka", 1000)
while True:
    print("""1. Add
                2.Delete
                3.Find
                4. Sum
                5.Exit/Quit""")
    ans=input("What would you like to do? ") 
    if ans=="1": 
        Table.put(input("Введите название предмета:"))
        print("\nAdded") 
    elif ans=="2": 
        Table.deleter()
        print("\nDeleted") 
    elif ans=="3": 
        print("\n Name find - ")
        Table.get_by_name(insert())
    elif ans=="4": 
        print("\n Sum = ") 
        Table.get_cost_sum()
    elif ans =="5":
        print("Good bye")
    elif ans !="": 
        print("\n Not Valid Choice Try again")