python module import hook

clr.py

import sys
import imp


class Test:
    pass


class MyLoader:
    def load_module(self, fullname):
        try:
            return sys.modules[fullname]
        except KeyError:
            pass
        print "--- load ---"
        print fullname
        m = Test()
        m.__file__ = "clr:" + fullname
        m.__path__ = []
        m.__loader__ = self
        m.__call__ = lambda : sys.stdout.write("i'm " + fullname + '\n')
        sys.modules.setdefault(fullname, m)
        return m

class MyFinder:
    def find_module(self, fullname, path = None):
        print "--- find ---"
        print fullname
        print path
        if fullname.startswith("clr."):
            return MyLoader()
        return None

print "--- init ---"
__path__ = []
sys.meta_path.append(MyFinder())


# from clr.Foo.Bar import Baz
# Baz()