language: python
python:
  - "3.2"
  - "3.3"
  - "3.4"
  - "3.5"
  - "3.6"
  - "3.7-dev"
install: 
  - if [ "$TRAVIS_PYTHON_VERSION" == "3.2" ]; then travis_retry pip install coverage==3.7.1; fi
  - if [ "$TRAVIS_PYTHON_VERSION" != "3.2" ]; then travis_retry pip install coverage; fi
  - "pip install flake8 pytest pytest-cov"
before_script:
  # stop the build if there are Python syntax errors or undefined names
  - if [ "$TRAVIS_PYTHON_VERSION" == "3.6" ]; then flake8 . --count --select=E901,E999,F821,F822,F823 --show-source --statistics; fi
  # exit-zero treats all errors as warnings.  The GitHub editor is 127 chars wide
  - if [ "$TRAVIS_PYTHON_VERSION" == "3.6" ]; then flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics; fi
script: py.test --doctest-modules --cov ./