Continue debug travis file to pass tests on osx

Author: vo-va

.travis.yml

@@ -1,13 +1,13 @@
 language: python
 cache: pip
 
-python:
-  - 2.7
-  - 3.4
-  - 3.5
-  - 3.6
-  - pypy
-  - pypy3
+#python:
+#  - 2.7
+#  - 3.4
+#  - 3.5
+#  - 3.6
+#  - pypy
+#  - pypy3
 
 matrix:
   include:
@@ -24,9 +24,11 @@ matrix:
 
 install:
   - if [[ $TRAVIS_OS_NAME == osx ]]; then brew update; fi
-  - if [[ $TRAVIS_OS_NAME == osx ]]; then brew upgrade openssl; fi
+  - if [[ $TRAVIS_OS_NAME == osx && $PYTHON_VERSION == 3 ]]; then brew upgrade python; fi
+  - if [[ $TRAVIS_OS_NAME == osx ]]; then brew list openssl &>/dev/null || brew install openssl; fi
   - if [[ $TRAVIS_OS_NAME == osx ]]; then export LDFLAGS="-L$(brew --prefix openssl)/lib" CFLAGS="-I$(brew --prefix openssl)/include"; fi
-  - virtualenv --python=python$PYTHON_VERSION env
+  - if [[ $TRAVIS_OS_NAME == osx && $PYTHON_VERSION == 3 ]]; then python -m venv env; fi
+  - if [[ $TRAVIS_OS_NAME == osx && $PYTHON_VERSION == 2 ]]; then virtualenv --python=python$PYTHON_VERSION env; fi
   - source env/bin/activate
   - make install
   - if [[ $TRAVIS_PYTHON_VERSION == pypy ]]; then pip install lxml==3.8.0; fi