xdc_git_python_20210511/python_base/day8/有参数装饰器和返回值的装饰器.py

# -*- coding: UTF-8 -*-

###============ 参数返回    ============###

# 
# def echo(msg):
#     print(f"徐大虫{msg}！")

# def outer(arg):
#     def inner():
#         print("*" * 30)     # 新增功能 
#         arg('hello')  
#         print("*" * 30)     # 上下都可新增功能
#     return inner
# n = outer(echo)  # python 封装为 @ 。如下： 
# n()

###============ 单个参数传递    ============###

# def echo(msg):
#     print(f"徐大虫{msg}！")

# def outer(arg):
#     def inner(s):
#         print("*" * 30)     # 新增功能 
#         arg(s)  
#         print("*" * 30)     # 上下都可新增功能
#     return inner
# echo = outer(echo)  # python 封装为 @ 。如下： 
# echo('active')


###============ 多个参数传递    ============###

def echo(msg):
    print(f"徐大虫{msg}！")

def outer(arg):
    def inner(*args, **kwargs):
        print("*" * 30)     # 新增功能 
        arg(*args, **kwargs)  
        print("*" * 30)     # 上下都可新增功能
    return inner
echo = outer(echo)  # python 封装为 @ 。如下： 
echo('hi!')

@outer
def show(msg):
    print(f"{msg}  OK")
show('xclouds')

###============ 写装饰器的固定格式    ============###

def auth(func):
    def wrapper(*args, **kwargs):
        r = func(*args, **kwargs)
        return r
    return wrapper

@auth # foo2 = auth(foo2)
def foo2(msg):
    up_msg= msg.upper()
    return up_msg
r = foo2('hello')
print(r)