anchor.diff:  { lib
   , buildPythonPackage
  -, fetchPypi
  +, fetchFromGitHub
   , pytest
   , mock
   , bokeh
  
positive.code: , mxnet
  , scikit-optimize
  , tensorflow
  , sqlalchemy
  , numpy
  , scipy
  
negative.code: , colorlog
  , pandas
  , alembic
  , tqdm
  , typing
  , pythonOlder
  , isPy27
  