Question

每次迭代for循环时，我都想创建新的类实例。所以我的班级变量也反映了变化

例如，我正在创建票务预订系统，并为每张票证分配一个预订号（pnr号）

我的循环

for ticket in range(book_tickets):
                fname=input("Enter your Name")
                lname=input("Enter last name")
                gender = input('Enter Gender')
                age=input('Enter age')
                passenger = Ticket(fname,lname,age,gender)
                passenger.generate_ticket()

我的乘客实例正在创建相同的重新创建类，而所有更改均保持不变

我的完整代码：

class Ticket:
    pnr_starting=1734619274
    pnr=[1734619272,1734619273,1734619271]
    no_of_tickets =3

    file = open('Tickets.txt','a')
    def __init__(self,fname,lname,age,gender):
        self.fname = fname
        self.lname = lname
        self.age = age
        self.gender = gender

    def generate_ticket(self):
        if self.no_of_tickets>0:
            Ticket.no_of_tickets -=1
            pnr_no=self.pnr_starting+1

            self.file.write('Name :'+self.fname + self.lname+
                            '\n Age :'+str(self.age)+
                            '\n Gender:'+self.gender+
                            '\n Pnr no:'+str(pnr_no)+'\n')

            print("Ticket Generated Succefully")

            self.pnr.append(pnr_no)
        else :
            print('No Ticket Available')

    def cancel_ticket(self):
        enter_pnr = int(input('Enter your Pnr Number to Cancel the Ticket'))
        if enter_pnr in self.pnr:

            print('Ticket Cancelled Succesfully')
            Ticket.no_of_tickets+=1

        else :
            print('Invlaid PNR or no such pnr')

'''
t1 = Ticket('Vidit','Shah',21,'M')
print(t1.generate_ticket())
print(Ticket.no_of_tickets)
print(t1.cancel_ticket())
print(Ticket.no_of_tickets)
'''


IRCTC = {'Vidit':'qwerty','Rahul':'asdfgh'}

username= input("Enter user name")
password = input("enter Password")
if username in IRCTC and password==IRCTC[username]:
    print('Welcome Username: ',username,'\n')
    book_tickets = int(input('How Many Tickets would you like to Book'))

    if book_tickets > Ticket.no_of_tickets:
        print("Only {} Tickets Available".format(Ticket.no_of_tickets))

    else:
        choice=int(input("Enter 1 to book the Ticket \n Enter 2 to Cancel the ticket"))

        if choice==1:
                for ticket in range(book_tickets):
                    fname=input("Enter your Name")
                    lname=input("Enter last name")
                    gender = input('Enter Gender')
                    age=input('Enter age')
                    passenger = Ticket(fname,lname,age,gender)
                    passenger.generate_ticket()
        if choice==2:
            Ticket.cancel_ticket()
else:
    print('Invalid Details')

如果我尝试创建2张或更多票证，我的PNR编号始终保持不变。

请引导我此致， Vidit Shah

在for循环中迭代时创建新的类实例

0 个答案: