machine:
  python:
    version: 3.5.2
  environment:
    SECRET_KEY: abcd
dependencies:
  override:
    - pip install -e .[dev]
test:
  override:
    - promgen test
  post:
    - coverage html -d $CIRCLE_ARTIFACTS

machine:
  python:
    version: 3.5.1
  environment:
    SECRET_KEY: abcd
dependencies:
  override:
    - pip install -e .[dev]
test:
  override:
    - promgen test
  post:
    - coverage html -d $CIRCLE_ARTIFACTS

Fix Python version for CircleCI
Fix Python version for CircleCI
