memcached decorator for functions

memcached_decorator.py

import time
import re
import urllib2
from memcache import Client

servers = ["127.0.0.1:11211"]
mc = Client(servers, debug=False)

def memcached_value(func):
	def strigify(str):
		# remove white space, {}, () and '
		return re.sub('[(),{}\'\s]', '', str)


	def check_cache(cache_key, auto_save=True):
		'''
		Returns a tuple formed by a boolean value if the value was found in cache or not and the cache value.
		If the cache key was not found the cached value will be None. If the key was found, the second 
		element of the tuple will be the cached value.
		>> check_cache('mykey')
		>> (True, 5)
		>> check_cache('mykey2')
		>> (False, None)
		'''
		cache = mc.get(cache_key)
		return (cache is not None, cache)

	def cache_value(key, value):
		mc.set(key, value)

	def wrapper(*args, **kwargs):
		cache_key = strigify("{0}{1}{2}".format(func.__name__, args, kwargs))
		
		is_cached, ret_val = check_cache(cache_key)
		if not is_cached:
			ret_val = func(*args, **kwargs)
			cache_value(cache_key, ret_val)
			return ret_val
	
		return ret_val

	return wrapper

@memcached_value
def get_page(url):
	response = urllib2.urlopen(url)
	html = response.read()
	return html

if __name__ == "__main__":
	res = get_page('https://en.wikipedia.org/wiki/Main_Page')
	print res