I wrote this one:
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def load_plugin(self, plugin, paths):
import imp
# check if we haven't loaded it already
try:
return sys.modules[plugin]
except KeyError:
pass
# ok, the load it
fp, filename, desc = imp.find_module(plugin, paths)
try:
mod = imp.load_module(plugin, fp, filename, desc)
finally:
if fp:
fp.close()
# instantiate and put into basket
clazz = mod.main(self.config)
if "input" in clazz.types:
self.inputs.append(clazz)
if "parser" in clazz.types:
self.parser.append(clazz)
if "output" in clazz.types:
self.outputs.append(clazz)
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The imp module is the key:
http://docs.python.org/lib/module-imp.html
The parameters for the load module function, are found by look through
the directory. So my plugins had a convention:
They have a class called main, which is initialized with one argument,
the config object.
That is quite a simple plugin system. You can check out the whole thing
here:
https://developer.berlios.de/projects/feedisto/
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