Fix for python3.5 compatibility

5 jobs for master in 10 seconds (queued for 8 seconds)
Name Stage Failure
failed
test-py3.5 Py35
Coverage.py warning: Data file '/builds/nmaillet/rpg/.coverage.runner-yksxe3po-project-1568-concurrent-0867q4.121.186749' doesn't seem to be a coverage data file: 'NoneType' object is not iterable
Coverage.py warning: Data file '/builds/nmaillet/rpg/.coverage.runner-yksxe3po-project-1568-concurrent-0867q4.65.733087' doesn't seem to be a coverage data file: Couldn't use data file '/builds/nmaillet/rpg/.coverage.runner-yksxe3po-project-1568-concurrent-0867q4.65.733087': no such table: coverage_schema
Coverage.py warning: Data file '/builds/nmaillet/rpg/.coverage.runner-yksxe3po-project-1568-concurrent-0867q4.53.583420' doesn't seem to be a coverage data file: 'NoneType' object is not iterable
Coverage.py warning: Data file '/builds/nmaillet/rpg/.coverage.runner-yksxe3po-project-1568-concurrent-0867q4.63.208620' doesn't seem to be a coverage data file: 'NoneType' object is not iterable
Coverage.py warning: Data file '/builds/nmaillet/rpg/.coverage.runner-yksxe3po-project-1568-concurrent-0867q4.68.188703' doesn't seem to be a coverage data file: Couldn't use data file '/builds/nmaillet/rpg/.coverage.runner-yksxe3po-project-1568-concurrent-0867q4.68.188703': no such table: coverage_schema
Coverage.py warning: Data file '/builds/nmaillet/rpg/.coverage.runner-yksxe3po-project-1568-concurrent-0867q4.56.884267' doesn't seem to be a coverage data file: 'NoneType' object is not iterable
Coverage.py warning: Data file '/builds/nmaillet/rpg/.coverage.runner-yksxe3po-project-1568-concurrent-0867q4.134.871193' doesn't seem to be a coverage data file: Couldn't use data file '/builds/nmaillet/rpg/.coverage.runner-yksxe3po-project-1568-concurrent-0867q4.134.871193': no such table: coverage_schema
Coverage.py warning: Data file '/builds/nmaillet/rpg/.coverage.runner-yksxe3po-project-1568-concurrent-0867q4.132.821051' doesn't seem to be a coverage data file: Couldn't use data file '/builds/nmaillet/rpg/.coverage.runner-yksxe3po-project-1568-concurrent-0867q4.132.821051': no such table: coverage_schema
ERROR: Job failed: command terminated with exit code 1