importing modules dynamicly

[dubux]

I am trying to import modules dynamicly from a directory (modules/) in
which i have __init__.py with the __all__ variable set. Everything
imports correctly and I have verified this however I am stuck on
actually using my classes in the dynamicly imported modules.

this bit is in my main.py (or base script) to import the modules in
the modules/ directory:

loaded_modules = []
for item in modules:
  if item == '__init__.py': pass
  else:
    if item.endswith('.py'):
      __import__('modules.' + item[0:len(item) - 3])
      loaded_modules.append(item[0:len(item) - 3])
    else: pass

After loading all the modules, i try to do something like:

instance = modules.modulename.class()

And I get an AttributeError. What am I doing wrong here? Help please!!