
When $HOME environment variable is not defined below definition raises TypeError: VALIDATIONS_LOG_BASEDIR = os.path.join(os.environ.get('HOME'), 'validations') This replaces it by using os.path.expanduser[1] function VALIDATIONS_LOG_BASEDIR = os.path.expanduser('~/validations') This issue has been detected by Tobiko CI jobs [2]: validations_libs/constants.py:25: in <module> VALIDATIONS_LOG_BASEDIR = os.path.join(os.environ.get('HOME'), 'validations') posixpath.py:76: in join a = os.fspath(a) E TypeError: expected str, bytes or os.PathLike object, not NoneType [1] https://docs.python.org/3.6/library/os.path.html#os.path.expanduser [2] https://813cfae3a1563ccfbfb3-c77d7211b8c124ad183202888cc1ebe6.ssl.cf5.rackcdn.com/796831/4/check/devstack-tobiko-gate/67bcea8/tobiko_results_04_faults_faults.html Change-Id: I13ba1b2eb0b11c2aded35b44c7fbae643210a269