import pickle


class Seller:
    def __init__(self, id, name, surname):
        self.id = id
        self.name =name
        self.surname = surname

    def Read_info_seller(self):
        self.id = int(input("Enter seller's id: "))
        self.name = input("Enter seller's name: ")
        self.surname = input("Enter seller's surname: ")

    def Show_info(self):
        print("seller features: ", self.id, " , ", self.name, " , ", self.surname)


def write_file(list_seller1, n):
    file = open('D:\\Seller', 'wb')
    for i in range(n):
        pickle.dump(list_seller1[i], file)
    file.close()


def Read_file(n):
    list_seller1 = []
    file = open('D:\\Seller', 'rb')
    for i in range(n):
        list_seller1.append(pickle.load(file))
    file.close()
    return list_seller1


def sort(list_seller, n):
    for i in range(n):
        for j in range(n):
            if list_seller[i].name < list_seller[j].name:
                temp = list_seller[i]
                list_seller[i] = list_seller[j]
                list_seller[j] = temp
    return list_seller


list_seller = []
for i in range(0, 3):
    seller = Seller(0, "", "")
    seller.Read_info_seller()
    list_seller.append(seller)

list_seller=sort(list_seller, 3)
write_file(list_seller, 3)
list_seller = Read_file(3)

for i in range(0, 3):
    list_seller[i].Show_info()