Fix flake8 issues since release 3.6.0 Flake8 had a new release which raise new issues, namely: W504: line break after binary operator F841: local variable 'ex' is assigned to but never used W605: invalid escape sequence F821: undefined name 'buffer' (noqa seems the only way to avoid this false positive) Also pin flake8>=3.6 in our tests and make explicit that we use python3 to run flake8 tests.

Cubes
=====

This chapter describes how to define your own cubes and reuse already available cubes.

.. toctree::
   :maxdepth: 1

   layout.rst
   cc-newcube.rst
   available-cubes.rst