描述器

class Ten:
    def __get__(self, obj, objtype=None):
        return 10

class Ten:
    def __get__(self, obj, objtype=None):
        x = 1
        print("局部变量1：", locals()["x"])
        print("参数：\n", obj, objtype)
        x = 12
        print("局部变量2：", locals()["x"])
        print("x:", x)
        return 10

import logging

logging.basicConfig(level=logging.INFO)

class LoggedAgeAccess:
    def __get__(self, obj, objtype=None):
        value = obj._age
        logging.info('Accessing %r giving %r', 'age', value)
        return value

    def __set__(self, obj, value):
        logging.info('Updating %r to %r', 'age', value)
        obj._age = value

class Person:
    age = LoggedAgeAccess()
    def __init__(self, name, age):
        self.name = name
        self.age = age
        
    def birthday(self):
        self.age += 1  

mary = Person('Mary M', 30)

mary.age = 20

add.cache

{'add': [3, 3]}

add(1, 4)

0:  {'x': 1, 'y': 4, 'result': 5}

5

add.cache

{'add': [3, 3, 5, 5]}

@Function
def add2(x, y):
    result = x + y * 2
    return result

Function.cache

{'add': [3, 3, 5, 5], 'add2': []}

add2(3, 4)

11

Function.cache

{'add': [3, 3, 5, 5], 'add2': [11]}