[Python-Dev] Add __exports__ to modules

Ka-Ping Yee ping@lfw.org
Mon, 8 Jan 2001 18:00:08 -0800 (PST)

On Mon, 8 Jan 2001, Paul Prescod wrote:
> dir() is one of the "interactive tools" I'd like to work better in the
> presence of __exports__. On the other hand, dir() works pretty poorly
> for object instances today so maybe we need something new anyhow. 

I suggest a built-in function "methods()" that works like this:

    def methods(obj):
        if type(obj) is InstanceType: return methods(obj.__class__)
        results = []
        if hasattr(obj, '__bases__'):
            for base in obj.__bases__:
            filter(lambda k, o=obj: type(getattr(o, k)) in
                   [MethodType, BuiltinMethodType], dir(obj)))
        return unique(results)

    def unique(seq):
        dict = {}
        for item in seq: dict[item] = 1
        results = dict.keys()
        return results

    >>> import sys
    >>> methods(sys.stdin)
    ['close', 'fileno', 'flush', 'isatty', 'read', 'readinto', 'readline', 'readlines', 'seek', 'tell', 'truncate', 'write', 'writelines']
    >>> import SocketServer
    >>> methods(SocketServer.ForkingTCPServer)
    ['__init__', 'collect_children', 'fileno', 'finish_request', 'get_request', 'handle_error', 'handle_request', 'process_request', 'serve_forever', 'server_activate', 'server_bind', 'verify_request']

-- ?!ng

Happiness comes more from loving than being loved; and often when our
affection seems wounded it is is only our vanity bleeding. To love, and
to be hurt often, and to love again--this is the brave and happy life.
    -- J. E. Buchrose