Osmo Maatta <osm...@gmail.com> writes: > Hello, > > Sub class test fails. > ====================== > I have a program that needs to load plugin-classes during runtime. > > The program has these subdirectories (modules). > > $ tree > . > `-- test.py > | > |-- plugins > | |-- base_plugin.py > | |-- base_plugin.pyc > | |-- __init__.py > | `-- oca > | |-- __init__.py > | |-- open_clipart.py > > > The plugins (sub directory) contains one or more plugin modules, in this > test-case there is only one; oca/open_clipart.py. > > The plugins/base_plugin.py (contains class Plugin()) is a base class of > all plugins. > > I want to list and load all plugin-classes (that inherit from > base_plugin.Plugin). I have a Python code that successfully browses the > plugins, but the the test issubclass(x, base_plugin.Plugin) fails. > > Please see this Python code: > http://futuredesktop.com/tmp/test6.tar.gz > > Why the issubclass(entry, cls) test fails? > > if issubclass(entry, cls): > ....print "Found a subclass: " + key > ....subclasses.append(entry) > > I can see that the class names are right, even objects of these classes > are ok. > > My OS is Ubuntu 10.04. > $ python --version > Python 2.6.5 > > The actual, final product will be this > http://www.futuredesktop.com/clipart-applet/clipart-applet.ogv > It is a ClipArt query-engine and browser. > It can translate queries from "any" language to english ;-) > > Most kindly > Osmo Antero Maatta > Grønland, Oslo
Hi, I haven't looked closely at your problem, but are you aware of the __subclasses__ class method? E.g. >>> class A(object): pass ... >>> class B(A): pass ... >>> class C(A): pass ... >>> A.__subclasses__() [<class '__main__.B'>, <class '__main__.C'>] >>> This might help you. -- Arnaud -- http://mail.python.org/mailman/listinfo/python-list
