import imp
import plugins

def invoke( plugin_type, plugin_name, *args, **kwargs ):
  plugin_name = u"%s_%s" % ( plugin_type, plugin_name )
  plugin_location = imp.find_module( plugin_name, plugins.__path__ )
  plugin_module = imp.load_module( plugin_name, *plugin_location )

  function = getattr( plugin_module, plugin_type )
  return apply( function, args, kwargs )