How do I call anonymous classes from imported modules?

[James Stroud]

JoeSox wrote:
> I am importing 3rd party modules via a plugin script. I wish to
> iterate thru the modules and call a common method like .do_foobar() or
> something with all the imports.
> But I can't figure out how to do something like below without knowing
> the class name before hand.  Is there a builtin that helps call
> classes anonymously?
> 
> 
> (Calling example.do_foobar() works because I manually enter the classes' name)
> 
>>>>a=MyApp()
>>>>sensorsList = []
>>>>for snames in a.pluginsDict["sensorsplugins"]:
> 
> 		sensorsList.append(__import__(snames))
> 
>>>>sensorsList[0].example.do_foobar()
> 
> 
> but I need something like
> 
>>>>sensorsList[0][0].do_foobar()
> 
> because I will not know the plugin class names.
> 

Quick and dirty (you could also use a try: except:):

f = __import__(module_name)
for anobj in f.__dict__.values():
   if hasattr(anobj, 'do_foobar'):
     anobj.do_foobar()

Note that this does not test whether anobj is a class as this would 
entail a type-check, which hints to poor design.

James

-- 
James Stroud
UCLA-DOE Institute for Genomics and Proteomics
Box 951570
Los Angeles, CA 90095

http://www.jamesstroud.com/