Sentinels

This is a reference implementation of a utility for the definition of sentinel values in Python. This also includes a draft PEP for the inclusion of this utility in the Python standard library.

Usage

from sentinels import Sentinel

NotGiven = Sentinel('NotGiven')

MEGA = Sentinel('MEGA', repr='<MEGA>', module_name='my_mod')

References

• Discussion on the python-dev mailing list
• Poll and additional discussion on discuss.python.org