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)
