如何添加方法属性？

Question

是否可以将方法属性添加到 python class:

# something similar to this perhaps:
p.new_salary_getter = lambda(self, i) { return self.salaries[i] }

这是一个完整的示例上下文：

class Person:
    def __init__(self, name: str, age: int) -> None:
        self.name = name
        self.age = age

p = Person("oren", 28)
for i in range(12):
    if hasattr(p, "salaries"):
        salaries = getattr(p, "salaries")
        salaries[i] = 1000*i
    else:
        p.salaries = {i: 1000*i}

def getter(i: int) -> int:
    return self.salaries[i]

p.get_salary = getter
p.get_salary(7)

我得到的错误：

Traceback (most recent call last):
  File "main.py", line 18, in <module>
    p.get_salary(7)
  File "main.py", line 15, in getter
    return self.salaries[i]
NameError: name 'self' is not defined

Answer 1

由于您现在正在定义自己的函数而不是使用 lambda，我将切换到该策略。

这是一些代码，'works' 其中 class 稍后添加了一个方法：

class Person:
    def __init__(self, name: str, age: int) -> None:
        self.name = name
        self.age = age

p = Person("oren", 28)

p.salaries = [1,2,3]

def getter(self, i: int) -> int:
    return self.salaries[i]

Person.get_salary = getter
print(p.get_salary(0))

输出：

Answer 2

TLDR lambda 样式：

Person.get_salary = lambda self, i: self.salaries[i]

未来的我：你错过了 Person. 和 lambda 而没有 return

如何添加方法属性？

How to add a method attribute?

python

methods

attributes