在 python 中使用 super 调用父 class 的实例属性的正确方法

Question

我有以下代码，试图更好地理解super在 python 中的工作原理

class Person:
  species = "human"

  def __init__(self, name, age):
    self.name = name
    self.age = age

  def sing(self, song):
    return "{} wants to sing the {} song".format(self.name, song)

class Student(Person):
  def __init__(self, name, age, mark):
    self.mark = mark
    super(Student, self).__init__(name, age, mark)

student = Student(24, 8, "Ema")

此代码因错误而崩溃：

Traceback (most recent call last):
  File "main.py", line 23, in <module>
    student = Student(24, 8, "Ema")
  File "main.py", line 17, in __init__
    super(Student, self).__init__(name, age, mark)
TypeError: __init__() takes 3 positional arguments but 4 were given

我正在尝试使用父 class 的实例属性创建一个 object 学生，我到底做错了什么？

Answer 1

一个很好的解决方案作为例子：

class Person:
  species = "human"

  def __init__(self, name, age):
    self.name = name
    self.age = age

  def sing(self, song):
    return "{} will sing: {}".format(self.name, song)


class Profession(Person):
  def __init__(self, title, company, name, age):    # HERE
    super().__init__(name, age)                     # HERE
    self.title = title
    self.company = company


person = Person("James", 12)

print(person.__class__.species)

print(person.name)

print(person.sing("Tomorrow never die"))

profession = Profession("President", "Rathor Inc.", "Ema", 43)

print(profession.name)