message: travis pip fixed
diff: @@ -17,6 +17,10 @@ cache:
  before_install:
  - echo "Installing C++ and Python"
  + - sudo add-apt-repository universe
  + - sudo apt install python2
  + - curl https://bootstrap.pypa.io/get-pip.py -o get-pip.py
  + - python2 get-pip.py
  - sudo apt-get update && sudo apt-get install -y --no-install-recommends --no-install-suggests g++ python-dev python-pip python3-dev python3-pip maven libnuma-dev libc-dev python3-venv openmpi-bin libopenmpi-dev
  - sudo pip3 install cpplint
  - cp /var/cache/apt/archives/*.deb $HOME/.cache/apt/
  