Python 3 fix
Python 3 fix


Former-commit-id: c46fff784e832fa0c656971ec16b430106fe1432 [formerly c46fff784e832fa0c656971ec16b430106fe1432 [formerly bdc2bc51f3fe3f1dc3f1595930988326db912331]]
Former-commit-id: 696bcb0e5ab8b14a79625b94f7e016fa1d853815
Former-commit-id: ed06bcf220a052ccf939b6b5f17ed31656606034
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine