On Wednesday 02 March 2005 11:28 pm, Tian wrote: > I am writing an audio game using Python. in this game you can apply > some sound effects for the clips you have recorded. I want to make this > function extensible. I want user to be able to add new sound effect > plug-ins in the future. > > I want the plug-in to be a simple python code (text file) and a > description file. I will set some rules for plug-in writing (like you > must inherit some class and implement some method). I hope plugin can > be added while original program is running. Is there any good method to > read in python code and test availability and invoke the functions > inside?
It's not hard to scrape the contents of a directory and import any modules you find (i.e. to implement a "plugin directory"). I do it here (beware line-wrap): http://cvs.sourceforge.net/viewcvs.py/narya-project/Narya1/VarImage/Operators/__init__.py?rev=1.1&view=markup You might not want to have the reading code in the same directory as the plugins -- you don't have to do it that way. Take a look at the __import__() built-in in the Python Library Reference for more information. I'm sure it's possible to run this code periodically at runtime, although I prefer to do it only at startup (what if one of the plugins is faulty and crashes the program?). Cheers, Terry -- -- Terry Hancock ( hancock at anansispaceworks.com ) Anansi Spaceworks http://www.anansispaceworks.com -- http://mail.python.org/mailman/listinfo/python-list
