install docker on travis-ci

jizhilong · jizhilong · commit 5bd129b9f453 · 2017-06-05T23:19:28.000+08:00
diff --git a/.travis.yml b/.travis.yml
@@ -2,6 +2,8 @@ sudo: required
 language: python
 python:
   - "2.7"
+services:
+  - docker
 install:
   - pip install .
 script:
