Please look at this in conjunction with the changes made to ctrl_orca, ticket DM-1783.

Changes here were made to update to python 3 (backwards compatible with python2.7), and ran pep8 and flake8.

If you have an questions please feel free to ask.

Fixed extraneous "is True" and "is False" conditionals.
Removed redundant references using list(keys())

Overall the changes seem fine to me. Some more cleanup to do; see the comments on the PR (mostly from Tim Jenness). Unfortunately the recent Github changes are not helping at all and it seems difficult to track the comments v.s. code changes....

I tried submitting a runOrca job on lsst-dev with this ticket branch, DM-7183, and a python 2 stack; the job started fine. I didn't verify beyond seeing some output data are generated.

Thanks, made those changes last night and pushed them.

I merged to master just now, and immediately realized that there may have been some lingering lsst10 references that needed to be changed to lsst-db. I fixed and pushed those too.