language: python
python:
  - "2.7"
  - "3.4"
  - "3.5"
  - "3.5-dev" # 3.5 development branch
  - "3.6"
  - "3.6-dev" # 3.6 development branch
install:
  - pip install --upgrade pip setuptools wheel pytest
  - pip install --only-binary=numpy numpy
  - pip install --only-binary=scipy scipy
  - pip install --only-binary=matplotlib matplotlib
script: pytest test

language: python
python:
  - "2.5"
  - "2.6"
  - "2.7"
  - "2.7-dev"
  - "3.4"
  - "3.5"
  - "3.5-dev" # 3.5 development branch
  - "3.6"
  - "3.6-dev" # 3.6 development branch
install:
  - pip install --upgrade pip setuptools wheel pytest
  - pip install --only-binary=numpy numpy
  - pip install --only-binary=scipy scipy
  - pip install --only-binary=matplotlib matplotlib
script: pytest test

Add even more Python 2.x versions
Add even more Python 2.x versions
