def flush(self):
        """remove all stale clients from pool"""
        now = time.time()
        to_remove = []
        for k, entry in self.pool.items():
            if entry.timestamp < now:
                entry.client.close()
                to_remove.append(k)
        for k in to_remove:
            del self.pool[k]
def flush ( self ) : now = time . time ( ) to_remove = [ ] for k , entry in self . pool . items ( ) : if entry . timestamp < now : entry . client . close ( ) to_remove . append ( k ) for k in to_remove : del self . pool [ k ]
remove all stale clients from pool