Include required antl3 library and check if datastore is available The datastore is checked for availability before requesting it to be cleared. This is because gaeftest uses its own method for ensuring no leakage of data by providing a temporary file as the backend. Reviewed by: Sverre Rabbelier

"""Multi-consumer multi-producer dispatching mechanism

Originally based on pydispatch (BSD) http://pypi.python.org/pypi/PyDispatcher/2.0.1
See license.txt for original license.

Heavily modified for Django's purposes.
"""

from django.dispatch.dispatcher import Signal