Syntax errors in Python 3.5

[toryhaavik]

I had an old conda environment running Python 3.5, and I pulled to get the latest 1.0.0 commits. When I try to run any pytests, I get the pytest config errors that have this in the stack trace:

During handling of the above exception, another exception occurred:
../../miniconda3/envs/ibis_dev/lib/python3.5/site-packages/_pytest/config.py:379: in _importconftest
    mod = conftestpath.pyimport()
../../miniconda3/envs/ibis_dev/lib/python3.5/site-packages/py/_path/local.py:662: in pyimport
    __import__(modname)
E     File "/home/tory/git/ibis/ibis/__init__.py", line 67
E       **kwds,
E             ^
E   SyntaxError: invalid syntax

I think the addition of black has made incompatible changes for Python 3.5. This example is an extra comma at the end of an argument list that contains **kwargs.

If I build a new conda env with Python 3.6, the tests all pass.

[cpcloud]

Yep sounds right. Seems like we'll need a bug fix release fairly soon then.

[xmnlab]

probably related to this: psf/black#419

[cpcloud]

We'll need to officially support 3.5 (not in conda-forge, though) for a little while. I'll add some jobs to the CI to test 3.5.

[cpcloud]

This is fixed in black master: psf/black@cea13f4