def age(self, id):
path = self.hash(id)<EOL>if os.path.exists(path):<EOL><INDENT>modified = datetime.datetime.fromtimestamp(os.stat(path)[<NUM_LIT:8>])<EOL>age = datetime.datetime.today() - modified<EOL>return age.days<EOL><DEDENT>else:<EOL><INDENT>return <NUM_LIT:0><EOL><DEDENT>
Returns the age of the cache entry, in days.