#! /usr/bin/env python

import os, re, sys

def loadPlugins():
    path = os.path.abspath(os.path.dirname(sys.argv[0]) + '/plugins')
    print "Path: %s" % path

    files = os.listdir(path)
    print "Files: %s " % files

    print "Applying re with pattern: _plugin\.py$"
    pattern = re.compile("_plugin\.py$", re.IGNORECASE)
    files = filter(pattern.search, files)

    filesToModuleName = lambda f: os.path.splitext(f)[0]
    moduleNames = map(filesToModuleName, files)
    print "Files to module names: %s" % moduleNames

    plugins = []
    for module in moduleNames:
        plugins.append(__import__('plugins.'+module, fromlist=['']))

    return plugins

plugins = loadPlugins()
print "Plugins: %s" % plugins

for plugin in plugins:
    tmp = plugin.pluginMain()

---

Path: /ModuleLoading/plugins
Files: ['__init__.py', '__init__.pyc', 'loader.py', 'loader.pyc', 'SayHello_plugin.py', 'SayHello_plugin.pyc']
Applying re with pattern: _plugin\.py$
Files to module names: ['SayHello_plugin']
Plugins: [<module 'plugins.SayHello_plugin' from '/ModuleLoading/plugins/SayHello_plugin.py'>]
Hello, world!