def view_log(_execution, _job, _url, _alias):
"""View workflow or job execution logs."""
session = _get_session(_url, _alias)
exc = Execution(session, _execution)
logs = exc.job_logs(_job[0]) if _job else exc.logs()
try:
for line in logs:
sys.stdout.write('%s\n' % (line.encode('utf-8'), ))
except HTTPError:
# Azkaban responds with 500 if the execution or job isn't found
if _job:
raise AzkabanError('Execution %s and/or job %s not found.',
_execution, _job)
else:
raise AzkabanError('Execution %s not found.', _execution)
