Go get it here: https://www.python.org/downloads/release/python-390a3/
This is an early developer preview of Python 3.9
Python 3.9 is still in development. This releasee, 3.9.0a3 is the
third of six 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 (2020-05-18) and, if
necessary, may be modified or deleted up until the release candidate
phase (2020-08-10). Please keep in mind that this is a preview release
and its use is not recommended for production environments.
Major new features of the 3.9 series, compared to 3.8
Many new features for Python 3.9 are still being planned and written. Among the new major new features and changes so far:
PEP 602, Python adopts a stable annual release cadence
BPO 38379, garbage collection does not block on resurrected objects;
BPO 38692, os.pidfd_open added that allows process management without races and signals;- A number of standard library modules (audioop, ast, grp, _hashlib,
pwd, _posixsubprocess, random, select, struct, termios, zlib) are now
using the stable ABI defined by PEP 384. - (Hey, fellow core developer, if a feature you find important is missing from this list, let Łukasz know.)
The next pre-release of Python 3.9 will be 3.9.0a4, currently scheduled for 2020-02-17.
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