我正在尝试创建一个名为“ Person”的类，只需按用户的名字，姓氏，年龄和国家（包括自动编号ID）添加用户即可。尽管当我输入详细信息时，所有详细信息都重复显示相同的详细信息，而我希望ID像用户1一样增加1，用户2属于ID 2，等等。

我希望程序如何工作：

------------------------------
ID: 1
FIRST NAME: John
LAST NAME: Smith
AGE: 32
COUNTRY: United Kingdom
------------------------------
------------------------------
ID: 2 
FIRST NAME: Amanda
LAST NAME: Smith
AGE: 56
COUNTRY: Germany
------------------------------

我的程序如何显示：

Enter First Name: John
Enter Last Name: Smith
Enter Age: 32
Enter Country: United Kindom
Add another person? Y or N: N
Finished
------------------------------
ID: 1
FIRST NAME: John
LAST NAME: Smith
AGE: 32
COUNTRY: United Kingdom
------------------------------
------------------------------
ID: 1
FIRST NAME: John
LAST NAME: Smith
AGE: 32
COUNTRY: United Kingdom
------------------------------

有人可以指出我在这里出问题了吗？或如何解决我的问题？

我的Python代码：

class Person:
    personid = 0

    def __init__(self,firstname,lastname,age,country):
        self.personid =+ 1
        self.firstname = firstname
        self.lastname = lastname
        self.age = age
        self.country = country

    def addPerson(self):
        person = []
        person.append(self.personid)
        person.append(self.firstname)
        person.append(self.lastname)
        person.append(self.age)
        person.append(self.country)

    def displayPeople(self):
        print("-" * 30)
        print("PERSON ID: ",self.personid)
        print('FIRST NAME:',self.firstname,'\nLAST 
        NAME:',self.lastname,'\nAGE:',self.age,'\nCOUNTRY:',self.country)
        print("-" * 30)

    def addAnotherPerson(self):
        option = input("Add another person? Y or N: ")
        if option == "Y":
            Person(
                firstname=input("Enter First Name: "),lastname=input("Enter Last Name: "),age=input("Enter Age: "),country=input("Enter Country: ")
            )
            Person.addAnotherPerson(self)
            Person.displayPeople(self)
        else:
            print("Finished")
            Person.displayPeople(self)

 perx = Person(
    firstname = input("Enter First Name: "),lastname = input("Enter Last Name: "),age = input("Enter Age: "),country = input("Enter Country: ")
 )
 perx.addPerson()
 perx.displayPeople()
 perx.addAnotherPerson()