##-coding:utf-8-##
def html_tags(tag_name):
print
print 'call html_tags(tag_name): ' + tag_name
def wrapper_(func):
print "\tcall warpper_(func): " + func.__name__ +" " + str(type(func))
def wrapper(*args, **kwargs):
print "\t\tcall wrapper(*args, **kwargs): " + args.__str__() + ", " + kwargs.__str__()
print "\t\t\ttag_name: " + tag_name + ", callfunc: " + func.__name__
content = func(*args, **kwargs)
return "<{tag}>{content}</{tag}>".format(tag=tag_name, content=content)
return wrapper
return wrapper_
# @html_tags('c') 相当于执行了hello = html_tag('c')(hello)，注入进去，返回一个匿名函数hello，
# print hello('word1')相当于执行 hello（'word1')
@html_tags('c') #hello = html_tag('c')(hello)
def hello(name='Toby'):
return 'Hello {}!'.format(name)
print hello('word1') #hello('word')
res = html_tags('b')(hello) #由于有@html_tag装饰，hello = html_tag('c')(hello)已经执行,res已经注入进去
print res('test1')
res = html_tags('a')(res) #注入上一个, 函数栈，如果不是res而hello，将注入c而不是b
print res('test2')
print "\n这是hello('word2')调用"
print hello('word2') #hello('word2')
@html_tags('d')
def demo(name='test3'):
return 'Hello {}!'.format(name)
print demo('word3')
exit()
结果：/usr/bin/python demo.py
call html_tags(tag_name): c
call warpper_(func): hello <type 'function'>
call wrapper(*args, **kwargs): ('word1',), {}
tag_name: c, callfunc: hello
<c>Hello word1!</c>
call html_tags(tag_name): b
call warpper_(func): wrapper <type 'function'>
call wrapper(*args, **kwargs): ('test1',), {}
tag_name: b, callfunc: wrapper
call wrapper(*args, **kwargs): ('test1',), {}
tag_name: c, callfunc: hello
<b><c>Hello test1!</c></b>
call html_tags(tag_name): a
call warpper_(func): wrapper <type 'function'>
call wrapper(*args, **kwargs): ('test2',), {}
tag_name: a, callfunc: wrapper
call wrapper(*args, **kwargs): ('test2',), {}
tag_name: b, callfunc: wrapper
call wrapper(*args, **kwargs): ('test2',), {}
tag_name: c, callfunc: hello
<a><b><c>Hello test2!</c></b></a>
这是hello('word2')调用
call wrapper(*args, **kwargs): ('word2',), {}
tag_name: c, callfunc: hello
<c>Hello word2!</c>
call html_tags(tag_name): d
call warpper_(func): demo <type 'function'>
call wrapper(*args, **kwargs): ('word3',), {}
tag_name: d, callfunc: demo
<d>Hello word3!</d>
Process finished with exit code 0
