python 装饰器案例

# -*- coding: utf-8 -*-
# author：baoshan
# 带参数的函数装饰器


def say_hello(country):
    def wrapper(func):
        def deco(*args, **kwargs):
            if country == 'china':
                print('你好！')
            elif country == 'america':
                print('hello')
            else:
                return
            func(*args, **kwargs)
        return deco
    return wrapper


@say_hello('china')
def chinese():
    print('我来自中国。')


@say_hello('america')
def america():
    print('I am from America.')


america()
print('-'*20)
chinese()

输出结果：

hello
I am from America.
--------------------
你好！
我来自中国。

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