Python 中 super 用法

class PooledDatabase(object):
    def __init__(self, database, max_connections=20, stale_timeout=None,
                 timeout=None, **kwargs):
        self._max_connections = make_int(max_connections)
        self._stale_timeout = make_int(stale_timeout)
        self._wait_timeout = make_int(timeout)
        if self._wait_timeout == 0:
            self._wait_timeout = float('inf')

        self._pool_lock = threading.RLock()

        # Available / idle connections stored in a heap, sorted oldest first.
        self._connections = []

        # Mapping of connection id to PoolConnection. Ordinarily we would want
        # to use something like a WeakKeyDictionary, but Python typically won't
        # allow us to create weak references to connection objects.
        self._in_use = {}

        # Use the memory address of the connection as the key in the event the
        # connection object is not hashable. Connections will not get
        # garbage-collected, however, because a reference to them will persist
        # in "_in_use" as long as the conn has not been closed.
        self.conn_key = id

        super(PooledDatabase, self).__init__(database, **kwargs)

这里这种用法正确么？ super(PooledDatabase, self).init(database, **kwargs)