Who knows somefunction?

[Chad Netzer]

On Thursday 26 September 2002 14:38, Brian Quinlan wrote:
> Nope. You might want to consider creating your own dictionary to map
> ids to the objects that you are interested in.

That got me thinking about whether there is an easy (and robust) way to 
built a dictionary of all the object-id:object pairs in the current 
environment.

The following is some dumb code to start with.  Does anyone know of a 
(non-ridiculous) way to improve it, out of curiosity?

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
def add_ids_to_dict( l, d ):
    all_previously_added = 1

    # Add all objects to dict, unless already there
    for o in l:
        if not d.has_key( id( o ) ):
            d[ id( o ) ] = o

            # Adding a new object means they weren't already there
            all_previously_added = 0

    # Give up if all objects in list were already in dict, otherwise
    # recurse on all objects in the list
    if not all_previously_added:
        for o in l:
            if hasattr( o, '__dict__' ):
                add_ids_to_dict( o.__dict__.keys(), d )
                add_ids_to_dict( o.__dict__.values(), d )
            else:
                add_ids_to_dict( dir( o ), d )

    return

if __name__ == '__main__':
    objects_dict = {}
    add_ids_to_dict( globals(), objects_dict )

    print objects_dict
    print len( objects_dict.keys() )
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Chad Netzer
cnetzer at mail.arc.nasa.gov