__init_yu（）缺少1个必需的位置参数（Python3）

Question

在我学习python的过程中，我在以下代码中遇到了一个错误：

class User:
    def __init__(self, first_name, last_name, location, payment_method):
        self.first_name = first_name
        self.last_name = last_name
        self.location = location
        self.payment_method = payment_method
        self.login_attempts = 0

    def increment_login_attempts(self):
        self.login_attempts += 1

    def reset_login_attempts(self):
        self.login_attempts = 0

    def printing_login_attempts(self):
        print('Quantity of login attempts: ' + str(self.login_attempts))

    def describe_user(self):
        print('Current user first name: ' + self.first_name.title())
        print('Current user last name: ' + self.last_name.title())
        print('Location is ' + self.location.title() + '. Payment method is ' + self.payment_method)

    def greet_user(self):
        print('Hello ' + self.first_name.title() + ' ' + self.last_name.title() + '!!!')


class Admin(User):
    def __init__(self, first_name, last_name, location, payment_method):
        super().__init__(first_name, last_name, location, payment_method)
        self.privilegis = Privilegis()


class Privilegis:
    def __init__(self, privilegis_type):
        self.privilegis_type = ['Allow to delete users', 'Allow to rename users', 'Allow to ban users']
    def show_privilegis(self):
        print('Special admins privilegis are: ' + ', '.join(self.privilegis))

new_user = Admin('John', 'Edwards', 'LA', 'visa')
new_user.privilegis.show_privilegis()

错误描述

^{pr2}$

我不明白问题出在哪里。我应该如何使用一个类（Privilegis）作为另一个（Admin）的属性？在

Answer 1

您的Admin类有一个privilegis属性，该属性初始化Privilegis的实例。__init__()方法定义了如何初始化类，在您的例子中，它需要一个privilegis_type作为参数。在

如果希望在实例化时将此特权传递给Admin，请将该参数添加到其__init__方法中，并在内部将其传递给privilege属性。在

class Admin(User):
    def __init__(self, first_name, last_name, location, payment_method, privilegis_type): # add privilegis type
        super().__init__(first_name, last_name, location, payment_method)
        self.privilegis = Privilegis(privilegis_type) # pass that privilegis type, needed by the Privilegis class


class Privilegis:
    def __init__(self, privilegis_type):
        self.privilegis_type = ['Allow to delete users', 'Allow to rename users', 'Allow to ban users']
    def show_privilegis(self):
        print('Special admins privilegis are: ' + ', '.join(self.privilegis_type)) # fixed that also

虽然在代码中有两个主要错误：

• Privilegis类根本没有使用参数。您可以维护您的原始代码，删除使用一个合理的默认值，这取决于您要做什么。在
• self.privilegis未在Privilegis内的任何地方定义。我相信你希望它是self.privilegis_type

这意味着拥有这样的东西：

^{pr2}$