def connect(self): 
        try:
            self.connection = pymongo.Connection(self.host, self.port)
            self.db = self.connection[self.name]
        except AutoReconnect:
            raise DatabaseException("It's not possible connect to the database")
def chunkstring(s, n):
    return [ s[i:i+n] for i in xrange(0, len(s), n) ]