-Run ``pip install drakeutil``, then for Python steps inside your workflow include::
+Run ``pip install drakeutil``.
+For Python steps inside your workflow include the line::
+ from drakeutil import *
+This will populate the special family of variables ``INPUT``, ``OUTPUT`` from the environment. For example::
somefile.out <- somefile.in [python]
+ with open(INPUT) as istream:
+ with open(OUTPUT) as ostream:
+In the future we might add more helpers. Can you think of any that would be useful?
+- Support special ``INPUT`` and ``OUTPUT`` environment variables
+- Provide ``mysql_cursor`` helper when ``MySQLdb`` module is installed
.. _Drake: https://github.com/Factual/drake