pep8 fixes
pep8 fixes


Former-commit-id: 9a74ffc8c6343a08791761a81d1c41dfce28e598 [formerly 9a74ffc8c6343a08791761a81d1c41dfce28e598 [formerly e488b147d63fe67aef0f80130eaba1648bbde694]]
Former-commit-id: b823b8fe290ab26ebbc89cb5da1eb31fa206f0c1
Former-commit-id: e1f76dc9e6dc714405b0fc6291051c9464120962
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine