language: python
dist: trusty
python:
   - "2.7"
   - "3.4"
   - "3.5"
   - "3.6"
   - "3.7"
install:
   - pip install -r requirements.txt -r requirements-dev.txt
script:
   - py.test --cache-clear --flake8 mdx_attr_cols.py tests.py

language: python
dist: trusty
matrix:
  include:
    - { python: "2.7" }
    - { python: "3.4" }
    - { python: "3.5" }
    - { python: "3.6" }
    - { python: "3.7", dist: xenial, sudo: true }  # Python 3.7+ requires Xenial
install:
   - pip install -r requirements.txt -r requirements-dev.txt
script:
   - py.test --cache-clear --flake8 mdx_attr_cols.py tests.py

Switch to build matrix to allow building with Python 3.7.
Switch to build matrix to allow building with Python 3.7.
