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Python 3.8.0a2

Release Date: Feb. 25, 2019

This is an early developer preview of Python 3.8

Major new features of the 3.8 series, compared to 3.7

Python 3.8 is still in development. This release, 3.8.0a2 is the second of four planned alpha releases. Alpha releases are intended to make it easier to test the current state of new features and bug fixes and to test the release process. During the alpha phase, features may be added up until the start of the beta phase (2019-05-26) and, if necessary, may be modified or deleted up until the release candidate (2019-09-29) . Please keep in mind that this is a preview release and its use is not recommended for production environments.

Many new features for Python 3.8 are still being planned and written. Among the new major new features and changes so far:

  • PEP 572, Assignment expressions
  • BPO 35766, typed_ast is merged back to CPython
  • BPO 35813, multiprocessing can now use shared memory segments to avoid pickling costs between processes
  • (Hey, fellow core developer, if a feature you find important is missing from this list, let Ɓukasz know.)

The next pre-release of Python 3.8 will be 3.8.0a3, currently scheduled for 2019-03-25.

More resources

And now for something completely different

Cut to the BBC world symbol.
Adrian (voice over): We interrupt this programme to annoy you and make things generally irritating for you.

Cut back to Mr Orbiter-5.
Mr Orbiter: ... with a large piece of wet paper. Turn the paper over - turn the paper over keeping your eye on the camel, and paste down the edge of the sailor's uniform, until the word 'Maudling' is almost totally obscured. Well, that's one way of doing it.

Cut to the BBC world symbol again.
Adrian (voice over): Good evening, we interrupt this programme again, a) to irritate you and, b) to provide work for one of our announcers.
Jack (voice over): Good evening, I'm the announcer who's just been given this job by the BBC and I'd just like to say how grateful I am to the BBC for providing me with work, particularly at this time of year, when things are a bit thin for us announcers...

Full Changelog


Version Operating System Description MD5 Sum File Size GPG
Gzipped source tarball Source release 5da7d318ce05fdfa4e5b43f844bfa468 23223186 SIG
XZ compressed source tarball Source release 7f151b7b56c93b137f55f12c1ba30526 17201560 SIG
macOS 64-bit installer macOS for OS X 10.9 and later 32c40dba370fa6fc6c2029ca913e50e0 28122412 SIG
Windows help file Windows 3d95e5d01773d4968c3b36dce9bbfe75 8149177 SIG
Windows x86-64 embeddable zip file Windows for AMD64/EM64T/x64 6d1daa215e6ebc5d90c586149255b6e6 7106677 SIG
Windows x86-64 executable installer Windows for AMD64/EM64T/x64 821835b9afd5a0b6da430a715e7fdc8e 26351040 SIG
Windows x86-64 web-based installer Windows for AMD64/EM64T/x64 81a1837c940759197b5f321df88ebd50 1362912 SIG
Windows x86 embeddable zip file Windows 63a25b63bb51b3a73745f4ed520e846e 6627153 SIG
Windows x86 executable installer Windows c29cbabd12f6ab4ed1f57029c302d7c0 25597160 SIG
Windows x86 web-based installer Windows ea30bc039f60cc7cb846af226214a200 1324584 SIG