python中通过字典实现函数指针

用字典的key-value代替if语句；并且value为函数的引用，实现c语言中函数指针的思想。

URL_FUNC_DICT= dict()  # 全局变量；将函数引用保存为字典的value

def route(url):  
	def set_func(func):
		URL_FUNC_DICT[url] = func
		def call_func(*args, **kwargs):		
			return func(*args, **kwargs)
		return call_func
	return set_func

@route("/index.py")  # 带参数的装饰器
def index():
	with open("./templates/index.html") as f:
		content = f.read()
	
	my_stock_info = "哈哈哈哈 这是你的本月名称...."
	
	content = re.sub(r"{%content%}", my_stock_info, content)
	
	return content

@route("/center.py")
def center():
	with open("./templates/center.html") as f:
		content = f.read()

	my_stock_info = "这里是从mysql查询出来的数据。。。"
	
	content = re.sub(r"{%content%}", my_stock_infor, content)

	return content

try:
	return URL_FUNC_DICT[file_name]  # 代替if语句，由字典key-value映射关系代替if语句
except Exception as ret:
	return "产生了异常：%s" % str(ret)