)]}'
{
  "commit": "b774da0d4255e56b957e78115cde7d4e3112af03",
  "tree": "333a3aa24f9b51a0effbf0117b3d2d7cae6498b3",
  "parents": [
    "d16bf914bc5ba569d2b70376051d15f68ce4322d"
  ],
  "author": {
    "name": "David L. Jones",
    "email": "dlj@google.com",
    "time": "Wed Sep 30 15:56:17 2020 -0700"
  },
  "committer": {
    "name": "GitHub",
    "email": "noreply@github.com",
    "time": "Wed Sep 30 15:56:17 2020 -0700"
  },
  "message": "Change Python kokoro configs to test only their specified version. (#7927)\n\nUsing non-versioned scripts for `build_file` means every Python version is\r\ntested (under Tox), and this is multiplied by each Python version running Tox.\r\n\r\nFor example, when the `python38` config is used to run Tox, the\r\nTox layer runs on Python 3.8. This then tests all of the Python versions\r\nindividually, including, for example, python27 tests.\r\n\r\nThis change fixes the `build_file` paths to point to the same-pathed build\r\nscript. For example, `kokoro/linux/python27/presubmit.cfg` now uses\r\n`kokoro/linux/python27/build.sh`.\r\n\r\nSome additional fixes:\r\n\r\n*  Use `python -m tox` in tests.sh instead of just `tox`. This helps non-site\r\n   installations of tox, where the `tox` script may not be on `$PATH`.\r\n*  Ensure tox (and other Python build-related packages) are available in\r\n   Python testing images. (New images have been pushed.)\r\n*  Disable `--warnings_as_errors` due to deprecated function.\r\n*  Remove apt lists per [Docker best practices][1].\r\n\r\n[1]: https://docs.docker.com/develop/develop-images/dockerfile_best-practices/",
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