Start running pyflakes locally again; and, fixes

skyfield/data/mpc.py

@@ -9,7 +9,6 @@ import pandas as pd
 from ..data.spice import inertial_frames
 from ..keplerlib import _KeplerOrbit
 from ..timelib import julian_day
-from ..units import Angle, Distance
 
 MPCORB_URL = 'https://www.minorplanetcenter.net/iau/MPCORB/MPCORB.DAT.gz'
 

test-code.sh

@@ -16,9 +16,9 @@ to install all of the tools and libraries for Skyfield development.
 EOF
     exit 2
 fi
-if python --version | grep -q 'Python 2.7'
+if python --version | grep -q 'Python 3.6'
 then
     d=$(python -c 'import skyfield as s; print(s.__file__.rsplit("/", 1)[0])')
-    pyflakes "$d"/skyfield/*.py
+    pyflakes "$d"/*.py "$d"/data/*.py
 fi
 exec assay --batch skyfield.tests