Yahoo Python API caching example

yahoo-api-caching.py

import time, urllib

class CacheFetcher:
    def __init__(self):
        self.cache = {}
    def fetch(self, url, max_age=0):
        if self.cache.has_key(url):
            if int(time.time()) - self.cache[url][0] < max_age:
                return self.cache[url][1]
        # Retrieve and cache
        data = urllib.urlopen(url).read()
        self.cache[url] = (time.time(), data)
        return data

# Create a CacheFetcher object
fetcher = CacheFetcher()

# First run should be slow.
data = fetcher.fetch('http://developer.yahoo. com/', 60)
# Should be faster, second time around
data = fetcher.fetch('http://developer.yahoo. com/', 60)