used xact version for python 3 on osx 3.4 (e.g 3.4 is not available)

Author: mzuehlke

.travis.yml

@@ -11,32 +11,29 @@ matrix:
     - os: linux
       language: python
       python: 2.7
-      env: TOXENV='2.7'
     - os: linux
       language: python
       python: 3.4
-      env: TOXENV='3.4'
     - os: linux
       language: python
       python: 3.5
-      env: TOXENV='3.5'
     - os: linux
       language: python
       python: 3.6
-      env: TOXENV='3.6'
     # OS-X ------------------------
     - os: osx
       language: generic
-      env: TOXENV='2.7'
+      env: PYTHON_VERSION='2.7'
     - os: osx
       language: generic
-      env: TOXENV='3.4'
+      # exact version required: 3.4  is not available
+      env: PYTHON_VERSION='3.4.7'
     - os: osx
       language: generic
-      env: TOXENV='3.5'
+      env: PYTHON_VERSION='3.5.4'
     - os: osx
       language: generic
-      env: TOXENV='3.6'
+      env: PYTHON_VERSION='3.6.4'
 
 # matrix end #####################################
 

ci/travis/before_script.sh

@@ -5,15 +5,17 @@ if [[ $TRAVIS_OS_NAME == 'osx' ]]; then
     # Install some custom requirements on OS X
     # e.g. brew install pyenv-virtualenv
     # See https://gist.github.com/Bouke/11261620
+    # and https://github.com/bincrafters/conan-bazel_installer
 
     brew update || brew update
     brew outdated pyenv || brew upgrade pyenv
     brew install pyenv-virtualenv
     eval "$(pyenv init -)"
     eval "$(pyenv virtualenv-init -)"
 
-    pyenv install --skip-existing $TOXENV
-    pyenv virtualenv $TOXENV jpy-venv
+    pyenv install --list
+    pyenv install --skip-existing $PYTHON_VERSION
+    pyenv virtualenv $PYTHON_VERSION jpy-venv
 
 else
     # Install pyenv