Find out why is something getting imported, as import fails in django sometimes leads to unhelpful "ImproperlyConfigured" exception

manage.py

#!/usr/bin/env python

import sys, traceback

class ImportBlocker(object):
    def find_module(self, fullname, path=None):
        if "mobil" in fullname and "mobile" not in fullname:
            print fullname
            print traceback.print_stack()
            raise Exception()

sys.meta_path = [ImportBlocker()]

# ... rest of manage.py ...