python 继承 class 具有 init 参数

Question

class Salary:
    def __init__(self, basic_salary_table):
        self.basic_salary_table = basic_salary_table
        pass

    def basic_salary(self):
        if self.grade == 0:
            if self.level > 50:
                return int(self.basic_salary_table[3][self.basic_salary_table[3]['level']==50]['basic_salary'])
            return int(self.basic_salary_table[3][self.basic_salary_table[3]['level']==self.level]['basic_salary'])
        else:
            self.grade = str(self.grade)+'grade'
            return int(self.basic_salary_table[0][self.basic_salary_table[0]['level']==self.level][self.grade])

class Person(Salary):
    def __init__(self, name, id, job, level, grade=0):
        self.name = name
        self.id = id
        self.job = job
        self.level = level
        self.grade = grade

当我将 Person 对象创建为 person1 然后调用 person1.basic_salary() 解释器说，'Person' 对象没有属性 'basic_salary_table'

Answer 1

您需要在子类的__init__方法中执行super().__init__方法。

object.__init__

Called after the instance has been created (by __new__()), but before it is returned to the caller. The arguments are those passed to the class constructor expression. If a base class has an __init__() method, the derived class’s __init__() method, if any, must explicitly call it to ensure proper initialization of the base class part of the instance; for example: super().__init__([args...]).

像这样：

class A:

    def __init__(self, a):
        self.a = a

    def print_a(self):
        print(self.a)


class B(A):

    def __init__(self, a, b):
        self.b = b
        super().__init__(a)


B(1, 2).print_a()

# 1

python 继承 class 具有 init 参数

python inheritance of class that have init argument

python

class

inheritance

init