version: 2
jobs:
  build:
    docker:
    - image: python:3-alpine3.6
    steps:
    - checkout
    - run:  pip install tox
    - run: tox

version: 2
jobs:
  build:
    docker:
    - image: python:stretch
    steps:
    - checkout
    - run: pip install tox
    - run: tox

Change Circle CI to use stretch container
Change Circle CI to use stretch container
