OpenStack Study: loadables.py

**** CubicPower OpenStack Study ****

# Copyright (c) 2011-2012 OpenStack Foundation

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"""

Generic Loadable class support.

Meant to be used by such things as scheduler filters and weights where we

want to load modules from certain directories and find certain types of

classes within those modules. Note that this is quite different than

generic plugins and the pluginmanager code that exists elsewhere.

Usage:

Create a directory with an __init__.py with code such as:

**** CubicPower OpenStack Study ****

class SomeLoadableClass(object):

pass