On Oct 10, 2:42 pm, "Diez B. Roggisch" <de...@nospam.web.de> wrote: > Scott Grant schrieb: > > > > > Hi there, > > > I'd like to set up a framework in which I can add or remove new > > classes of a given expected subclass to my package, and have the > > system load that set at runtime and be able to use them. In essence, > > if I have a class X, and subclasses A, B, and C that derive from X, > > what's the most pythonic way to allow me to add or remove A, B, or C > > from the package before runtime, to iterate over all known imported > > classes that inherit from X, while minimizing the modifications to my > > existing program. > > > Is the best way to set up a directory in my package for these classes, > > and to define the list of active imports in the __all__ list in > > __init__.py? Or is there a better way? > > > For detail, I'm writing a system that students will be able to submit > > game strategies that will compete against each other in a framework > > that passes them game state and expects moves in return. It would be > > great to be able to add or remove these player strategies as new ones > > come in, but I don't want to add a bunch of overhead importing each > > one specifically in the game manager itself. > > I think you re-think your approach and kind of invert it. Instead of > viewing your system as game-strategies plugged into the framework, make > a game-strategy *use* your framework. > > Thus what your students deliver must be an executable script that sets > up the game, and then passes the own strategy into it. > > Diez
Part of the benefit of the original approach (and the main reason I want to use it that way) is that in multi-player or competitive games, these strategies should be able to compete against each other. It it was a rock-paper-scissors system, I'd like strategy A to compete against strategy B, and with large sets of strategies, to allow my system to set up a crosstable with the minimal amount of hardcoding. I'd like to know which strategy is best by setting up a competition against all other submissions. -- http://mail.python.org/mailman/listinfo/python-list
