try testing python on osx on travis

.travis.yml

@@ -108,12 +108,21 @@ matrix:
     ###################
     # # Disabled because travis's OS X machines take hours (or days) to begin
     # running.  Or maybe they are just broken entirely.  Who knows.
-    - language: cpp
+    #- language: cpp
+    #  os: osx
+    #  osx_image: xcode9.2
+    #  env:
+    #    - VARIANT=test
+    #  script:
+    #    - dlib/travis/build-and-test.sh
+         
+          
+    ###################
+    - language: python
       os: osx
       osx_image: xcode9.2
+      python: 3.5
       env:
-        - VARIANT=test
+        - VARIANT=python-api
       script:
         - dlib/travis/build-and-test.sh
-         
-