Per PEP594 (https://python.github.io/peps/pep-0594/)
optparse is listed as deprecated as of python 3.2.
It is not scheduled for removal yet, but the following code uses it:

scripts/schema-dump.py:from optparse import OptionParser
scripts/imapServer.py:import optparse

these scripts should use argparse.

I've ported these scripts to argparse (and pushed the result) after some rudimentary testing. Note that the yaml output of schema-dump.py was already broken, it tries to split a string on '<' assigning the result to a 2-tuple resulting in a ValueError. May very well be that this works with the standard schema, though.

Let me know if we can close this (and open another issue for the yaml error? Unfortunately I don't know enough about the rudimentary parser implemented here to fix this.

Hi Ralf:

I have closed this and opened another issue for fixing the yaml parser: issue2551243.

I can't reproduce your error, but I'll have a new copy of the script checked in
in a few. Followup on the new issue.