Add pip caching for travis-ci

1 files changed, 4 insertions, 0 deletions

diff --git a/.travis.yml b/.travis.yml
index 9c96c5c..758176a 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -3,6 +3,10 @@ language: python
 python:
     - "2.7"
 
+cache:
+  directories:
+    - $HOME/.cache/pip
+
 addons:
     apt:
         packages: