Commits
François Saint-Jacques authored and Wes McKinney committed 4b3fbf3c274
ARROW-5739: [CI] Fix python docker image python docker image will fail to clean the build directory, installing a previous invocation of `docker-compose run python`. This is not affecting CI that drops the `/build` mount, but only local users. Author: François Saint-Jacques <fsaintjacques@gmail.com> Closes #4706 from fsaintjacques/ARROW-5739-docker-python-build and squashes the following commits: 421df4c89 <François Saint-Jacques> ARROW-5739: Fix python docker image