I haven't started on a diff for these yet, but the set of ports listed below have no other ports depending on the py2 versions, so could be made py3-only (or removed if they're currently py2- only; I haven't checked that yet) without affecting other ports.
There are some internal dependencies in the list i.e. some of the listed ports depend on other listed ports. Any complaints about making any of these py3-only? archivers/py-backports-lzma archivers/py-lzo audio/py-ao audio/py-audio audio/py-cddb audio/py-discid databases/py-bsddb3 databases/py-odbc databases/py-peewee databases/py-pickleshare databases/py-sql databases/py-storm databases/py-sybase devel/py-SOAPpy devel/py-ana devel/py-anytree devel/py-appdirs devel/py-argcomplete devel/py-argh devel/py-backcall devel/py-backports-abc devel/py-backports-functools-lru-cache devel/py-backports-shutil-get-terminal-size devel/py-backports-ssl-match-hostname devel/py-binplist devel/py-biplist devel/py-bitstring devel/py-blessings devel/py-blist devel/py-bytecodeassembler devel/py-cairocffi devel/py-characteristic devel/py-clint devel/py-configobj devel/py-cooldict devel/py-cstruct devel/py-dispatcher devel/py-easyprocess devel/py-editdist devel/py-efilter devel/py-entrypoints devel/py-faulthandler devel/py-filebytes devel/py-flaky devel/py-flexmock devel/py-fpconst devel/py-frozendict devel/py-functools32 devel/py-gdata devel/py-gitdb devel/py-gitpython devel/py-greenlet devel/py-guppy devel/py-hachoir-core devel/py-hachoir-metadata devel/py-hachoir-parser devel/py-ipython_genutils devel/py-iso3166 devel/py-iso639 devel/py-isodate devel/py-isort devel/py-jaraco-functools devel/py-jmespath devel/py-jsonrpclib devel/py-logilab-common devel/py-magic devel/py-mccabe devel/py-minimock devel/py-monotonic devel/py-mox devel/py-mox3 devel/py-munch devel/py-mxDateTime devel/py-nose-warnings-filters devel/py-nosexcover devel/py-olefile devel/py-parallel devel/py-pathlib devel/py-progress devel/py-progressbar devel/py-pyro devel/py-pyte devel/py-python2-pythondialog devel/py-rencode devel/py-robotframework devel/py-ruamel.ordereddict devel/py-send2trash devel/py-setuptools_scm_git_archive devel/py-setuptools_trial devel/py-sh devel/py-simpleeval devel/py-simplegeneric devel/py-singledispatch devel/py-smmap devel/py-stdnum devel/py-straight.plugin devel/py-subprocess32 devel/py-symboltype devel/py-tempora devel/py-test-forked devel/py-test-relaxed devel/py-test-subtesthack devel/py-testpath devel/py-tox devel/py-uv devel/py-vcversioner devel/py-voluptuous devel/py-wrapt devel/py-xlsxwriter devel/py-xmlrunner devel/py-yamllint devel/py-yapf mail/py-milter misc/py-memcached net/py-cymruwhois net/py-dnslib net/py-tld net/py-xmpppy net/py-zsi news/py-yenc security/py-axolotl-curve25519 security/py-pbkdf2 security/py-pysha3 sysutils/py-daemonize sysutils/py-filelock telephony/py-phonenumbers textproc/py-MarkupSafe textproc/py-PEG2 textproc/py-PyPDF2 textproc/py-colored textproc/py-cssutils textproc/py-defusedxml textproc/py-demjson textproc/py-dicttoxml textproc/py-jellyfish textproc/py-pandocfilters textproc/py-pdf www/ipynb-py-convert www/py-jonpy www/py-recaptcha-client www/py-wstools
