python - Python类继承有问题

Question

我正在上编程课，对于其中一个测试，我需要创建一个继承自已创建类的类。这是老师教我做的代码，但它似乎不起作用：

class Intern(Employer):
    def __init__(self, last_name, first_name, address, phone, email, end_date):
        Employer(last_name, first_name, address, phone, email)
        self.end_date=end_date
    def intern_info(self):
        self.print_info()
        print self.end_date

Answer 1

线

Employer(last_name, first_name, address, phone, email)

创建一个Employer在执行__init__()结束时立即被垃圾回收的对象。它不会Intern以任何方式影响对象。你的意思可能是这样的

Employer.__init__(self, last_name, first_name, address, phone, email)

或许

super(Intern, self).__init__(last_name, first_name, address, phone, email)

Answer 2

您self在Employer. 您需要使用super或self显式传递给父级的__init__. 您还需要显式调用父级的__init__方法。

class Intern(Employer):
    def __init__(self, last_name, first_name, address, phone, email, end_date):
        Employer.__init__(self, last_name, first_name, address, phone, email)
        self.end_date=end_date
    def intern_info(self):
        self.print_info()
        print self.end_date

Answer 3

您缺少缩进​​，这是 Python 中代码块的机制。

尝试：

class Intern(Employer):
    def __init__(self, last_name, first_name, address, phone, email, end_date):
        Employer(last_name, first_name, address, phone, email)
        self.end_date=end_date
    def intern_info(self):
        self.print_info()
        print self.end_date