.travis.yml

language: python
jobs:
  include:
    - name: "Python 3.8.0 on Xenial Linux"
      python: 3.8           # this works for Linux but is ignored on macOS or Windows
    - name: "Python 3.7.4 on macOS"
      os: osx
      osx_image: xcode11.2  # Python 3.7.4 running on macOS 10.14.4
      language: shell       # 'language: python' is an error on Travis CI macOS
    # - name: "Python 3.8.0 on Windows"
    #   os: windows           # Windows 10.0.17134 N/A Build 17134
    #   language: shell       # 'language: python' is an error on Travis CI Windows
    #   before_install:
    #     - choco install python --version=3.8.0
    #     - python -m pip install --upgrade pip
    #   env: PATH=/c/Python38:/c/Python38/Scripts:$PATH
install: 
  - pip3 install --upgrade pip  # all three OSes agree about 'pip3'
  - pip3 install cython
  - pip3 install numpy
  - pip3 install scipy
  - pip3 install matplotlib
  - python3 setup.py install || python setup.py install
script:
  - python3 -m unittest || python -m unittest