pep8 fix
pep8 fix


Former-commit-id: 8bce8982e8a97dbe27ea0b2bdbdf96b296b04e4c [formerly 8bce8982e8a97dbe27ea0b2bdbdf96b296b04e4c [formerly f1ddccd7e403dda8f4bb272d9cdafd72faf8ff8c]]
Former-commit-id: c3cb83a51ff49ca350601dadc38e126500d299ee
Former-commit-id: f5e416f9c722da7760ca31e03b605a7762bc7fd7
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine