Before all, I'm not a professional programmer but just a biophysics ph.d. student, so if something makes you scream of horror, please forgive me...
Ok, this is not straightforward at all. I am working on an application that uses plugins. Plugins are coded as small classes that become inherited by a main class ( a cmd.Cmd actually) in the following way: (see also this thread: http://groups.google.it/group/comp.lang.python/browse_thread/thread/4d6da027bb9249bd/0f95c60add4ef5ad ) --- ... def do_this(self, arg): ... print "THIS", arg ... >>> class Bar: ... def do_that(self, arg): ... print "THAT", arg ... >>> plugins = [Foo, Bar] >>> def make_command_class(*bases): ... return type(cmd.Cmd)("MyCli", bases + (cmd.Cmd,), {}) ... >>> cmd = make_command_class(*plugins)() >>> cmd.cmdloop() (Cmd) help Undocumented commands: ====================== help that this (Cmd) that one THAT one (Cmd) ----------- And it works. Now I'm trying to do the same trick for another base class, this time a WxPython frame. Also in this case, "plugging" seem to work, but with an important difference. In the command line plugin API, I define a _plug_init() method that is called in the main class __init__ . This for adding plugin-specific initializiations. That's what I do in the command line __init__: for plugin_name in self.config['plugins']: try: plugin=__import__(plugin_name) try: print type(self) eval('plugin.'+plugin_name +'Commands._plug_init(self)') except AttributeError: pass except ImportError: pass And it works flawlessly. Problem is, the exact same code when done using the wxFrame as the baseclass, doesn't work: #make sure we execute _plug_init() for every command line plugin we import for plugin_name in config['plugins']: try: plugin=__import__(plugin_name) try: print type(self) eval('plugin.'+plugin_name +'Gui._plug_init(self)') pass except AttributeError: pass except ImportError: pass with the following error: Traceback (most recent call last): File "hooke.py", line 801, in <module> main() File "hooke.py", line 787, in main main_frame = make_gui_class(*GUI_PLUGINS)(None, -1, ('Hooke '+__version__)) File "hooke.py", line 308, in __init__ eval('plugin.'+plugin_name+'Gui._plug_init(self)') File "<string>", line 1, in <module> TypeError: unbound method _plug_init() must be called with dummyguiplugGui instance as first argument (got MainWindowPlugged instance instead) The problem seems to be that if I call type(self) before doing the eval('plugin... ) line: - in the working case, I get type <type 'instance'> - in the not working case, I get <class '__main__.MainWindowPlugged'> At this point, it seems too much a deep object-oriented hell to be able to dig it myself. Would you help me getting some cue on the problem? m. -- http://mail.python.org/mailman/listinfo/python-list
