reflection as in Java: how to create an instance from a classname

[Bruno Desthuilliers]

guss a écrit :
> I cannot find a satisfying answer to this question on the web so let's
> try here.
> 
> My problem is the following, I would like to instantiate some object
> from a configuration file that would contain class names like for
> example classname=org.common.resource.MyResource.
> Here my resource is the class to instanciate and it is in the module
> resource that is in a package hierachy.
> 
> In fact I would like to do something very similar to the Java:
> 
> klass = Class.forname("org.common.resource.MyResource")
> 
> instance = klass.newInstance()
> 
> The second line is easy once I have a classobj but I have some
> problems to find the right recipe for getting it.
> 
> I know how to create a class from scratch with new.classobj but how do
> you get a class object and then create an object ?
> 
> I would like a recipe working for all cases (whatever the module is
> not the local one ...)

use __import__ to get the module object, then getattr(module, classname) 
to get the class object (sorry, no much time right now to give you a 
full recipe, but that should be enough to get you started).

HTH