import os, sys, site

def application(environ, start_response):

    global g_env_set

    if 'g_env_set' not in globals() or not g_env_set:

        os.environ['DJANGO_SETTINGS_MODULE'] = environ['DJANGO_SETTINGS_MODULE']

        prev_sys_path = list(sys.path)

        sys.path.append(environ['PROJECT_PATH'])

        for path in environ.get('PYTHON_PATH',"").split(os.pathsep):

            if path:

                site.addsitedir(path)  # @UndefinedVariable

        new_sys_path = [] 

        for item in list(sys.path): 

            if item not in prev_sys_path and item not in new_sys_path: 

                new_sys_path.append(item) 

                sys.path.remove(item)

        sys.path[:0] = new_sys_path

        g_env_set = True 

    import django.core.handlers.wsgi

    _application = django.core.handlers.wsgi.WSGIHandler()

    if environ.get('PYDEV_DEBUG', "False").lower() in ["true", "1", "t"]:

        import pydevd #@UnresolvedImport

        pydevd.settrace(suspend=False)

    return _application(environ, start_response)