gistfile1.py

import sys

from gunicorn import util
from gunicorn.app.base import Application

def make_tb_echo_app(exc):
    def app(environ, start_response):
        exc_type, exc_value, exc_info = exc
        # TODO logging the exception or re-raise
    return app


class MyApplication(Application):

    def load(self):
        try:
            return util.import_app(self.app_uri)
        except Exception, e:
            exc = sys.exc_info()
            return make_tb_echo_app(exc)