message: Upgrade pip and fix permission on Travis
diff: @@ -50,6 +50,7 @@ matrix:
  - 3.2
  before_install:
  - bash -x ${TRAVIS_BUILD_DIR}/.travis/python.configure.sh
  + - pip install --upgrade --ignore-installed --user travis pip
  - pip install pyarrow==0.11.1
  - cd R-package
  script:
  @@ -59,6 +60,7 @@ matrix:
  - 3.5
  before_install:
  - bash -x ${TRAVIS_BUILD_DIR}/.travis/python.configure.sh
  + - pip install --upgrade --ignore-installed --user travis pip
  - pip install pyarrow==0.11.1
  - cd R-package
  script:
  