update datasheet model for serializasation and dumpdata.
import os
import django.core.handlers.wsgi
application = django.core.handlers.wsgi.WSGIHandler()
if os.environ.get('PYDEV_DEBUG', "False").lower() in ["true", "1", "t"]:
import pydevd #@UnresolvedImport
pydevd.settrace(suspend=False)