docs only run in python3

Jiaqi Liu · Jiaqi Liu · commit 44471d97f4ae · 2017-08-25T14:02:13.000-07:00
diff --git a/.travis.yml b/.travis.yml
@@ -56,6 +56,9 @@ matrix:
           env: GROUP=python
         - python: 3.4
           env: GROUP=python
+    exclude:
+        - python: 2.7
+          env: GROUP=docs
 
 after_success:
     - codecov
