= Proposed System Wide Change: Python 3.7 = https://fedoraproject.org/wiki/Changes/Python3.7 Owner(s): * Charalampos Stratakis <cstratak at fedoraproject dot org> * Miro Hrončok <churchyard at fedoraproject dot org> * Tomáš Orsava <torsava at fedoraproject dot org> * Petr Viktorin <pviktori at fedoraproject dot org> Update the Python 3 stack in Fedora from Python 3.6 to Python 3.7. == Detailed description == Python 3.7 adds numerous features and optimizations. See the upstream notes at https://www.python.org/dev/peps/pep-0537/#features-for-3-7 and https://docs.python.org/3.7/whatsnew/3.7.html . === Important dates === * 2018-05-21 Python 3.7.0 candidate 1 * 2018-06-04 Python 3.7.0 candidate 2 (if necessary) * 2018-06-15 Python 3.7.0 final * 2018-07-11 Fedora 29 Mass Rebuild * 2018-08-14 Fedora 29 Change Checkpoint: Completion deadline (testable) (From https://www.python.org/dev/peps/pep-0537/#schedule and https://fedoraproject.org/wiki/Releases/29/Schedule .) === PEP 552 – Deterministic pycs === One change is notable from the packaging viewpoint: https://www.python.org/dev/peps/pep-0552/ – “Deterministic pycs”. We may decide to use the new UNCHECKED_HASH mode, which would mean that bytecode cache is not validated on import, i.e. changing a RPM-installed *.py file manually will have no effect (unless the corresponding __pycache__/*.pyc is updated or removed). == Scope == We will coordinate the work in a side tag and merge when ready. * Proposal owners: *# Retire python37 from F29+ *# Update python3 to what was in python37 *#* Mass rebuild all the packages that BR python3/python3-devel... (~2300 listed in [http://fedora.portingdb.xyz/ Python 3 Porting Database for Fedora]) *# Reintroduce python36 from Fedora 25. Update it to have all fixes and enhancements from python3 in Fedora 28 (or 29 before this change) * Other developers: Maintainers of packages that fail to rebuild during the mass rebuild will be asked, using bugzilla, to fix or remove their packages from the distribution. If any issues appear, they should be solvable either by communicating with upstreams first and/or applying downstream patches. Also the package maintainers should have a look at: https://docs.python.org/3.7/whatsnew/3.7.html#porting-to-python-3-7 . And python-maint team will be available to help with fixing issues. * Fedora QA: Based on some troubles with the https://fedoraproject.org/wiki/Changes/Python3.6 , we'd like to have an ack from QA before we merge the side tag. * Release engineering: https://pagure.io/releng/issue/7390 A targeted rebuild for all python packages will be required, before the mass rebuild. ** List of deliverables: nope * Policies and guidelines: nope * Trademark approval: nope -- Jan Kuřík Platform & Fedora Program Manager Red Hat Czech s.r.o., Purkynova 99/71, 612 45 Brno, Czech Republic _______________________________________________ devel mailing list -- devel@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to devel-leave@xxxxxxxxxxxxxxxxxxxxxxx
