Amazing Python 3: "@"

最新推荐文章于 2025-07-16 08:50:08 发布

原创最新推荐文章于 2025-07-16 08:50:08 发布 · 143 阅读

0 ·

CC 4.0 BY-SA版权

文章标签：

#Python #HTML

Python 专栏收录该内容

23 篇文章

订阅专栏

本文介绍了Python中装饰器的一种有趣用法，并展示了如何通过装饰器实现字符串调用函数的效果。此外，还详细讲解了如何使用@staticmethod来实现静态方法，包括两种不同的实现方式及其运行效果。

1. This an interesting usage that I don't know how to call it. See example:

def hehe(tt):    
    return 'hehe'+tt()

@hehe
def test():
    return 'test'

print test

The output is same as:

def hehe(tt):    
    return 'hehe'+tt()

def test():
    return 'test'

test = hehe(test)

print test

Output:

hehetest

P.S: It enables such an easy way to invoke functions by strings! - cloud

From http://www.pythonid.com/html/fenleiwenzhang/lang/20070910/185.html

2. Use "@staticmethod" to realize static method in Python (Python does not have keyword "static"):

class AClass():
    @staticmethod 
    def astatic():    # pay attention that there's no "self" here!
        print 'It's a static method!'

AClass.astatic()

Output:

It's a static method!

By the way, there's another way to make a method static with a same output:

class AClass():
    def aclassmethod(): 
        print 'It's a static method!'
    aclassmethod = classmethod(aclassmethod)   # you can write "whatevername = classmethod(aclassmethod)" after Python2.5

From http://wiki.woodpecker.org.cn/moin/PythonEssentialRef7