Notice: While JavaScript is not essential for this website, your interaction with the content will be limited. Please turn JavaScript on for the full experience.

Python 3.10.0a2

Release Date: Nov. 3, 2020

This is an early developer preview of Python 3.10

Major new features of the 3.10 series, compared to 3.9

Python 3.10 is still in development. This releasee, 3.10.0a2 is the second 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 (2021-05-03) and, if necessary, may be modified or deleted up until the release candidate phase (2021-10-04). Please keep in mind that this is a preview release and its use is not recommended for production environments.

Many new features for Python 3.10 are still being planned and written. Among the new major new features and changes so far:

  • PEP 623 -- Remove wstr from Unicode
  • PEP 604 -- Allow writing union types as X | Y
  • PEP 612 -- Parameter Specification Variables
  • PEP 626 -- Precise line numbers for debugging and other tools.
  • bpo-38605: from __future__ import annotations (PEP 563) is now the default.
  • PEP 618 -- Add Optional Length-Checking To zip.

  • (Hey, fellow core developer, if a feature you find important is missing from this list, let Pablo know.)

The next pre-release of Python 3.10 will be 3.10.0a3, currently scheduled for 2020-12-07.

More resources

And now for something completely different

The cardinality (the number of elements) of infinite sets can be one of the most surprising results of set theory. For example, there are the same amount of even natural numbers than natural numbers (which can be even or odd). There is also the same amount of rational numbers than natural numbers. But on the other hand, there are more real numbers between 0 and 1 than natural numbers! All these sets have infinite cardinality but turn out that some of these infinities are bigger than others. These infinite cardinalities normally are represented using aleph numbers. Infinite sets are strange beasts indeed.


Version Operating System Description MD5 Sum File Size GPG
Gzipped source tarball Source release c5c89efc35f5121397679c71157b9c7f 24.0 MB SIG
XZ compressed source tarball Source release 3280f4fa873ea36b2ce92db6b68d1bfe 17.8 MB SIG
macOS 64-bit installer macOS for OS X 10.9 and later 7effe89a3fb7286cc65aeff475d8ab31 28.2 MB SIG
Windows help file Windows 12ef25d95403caa3641ae0b6467c2bb1 8.4 MB SIG
Windows x86 embeddable zip file Windows c55e2683b5e4e5c569a8510db1e46c1f 7.2 MB SIG
Windows x86 executable installer Windows 4f12e8b064528a3a5856b1c3f6fca752 25.7 MB SIG
Windows x86 web-based installer Windows 81bc695c61e463a3286d2066609983ff 1.3 MB SIG
Windows x86-64 embeddable zip file Windows for AMD64/EM64T/x64 c54651fdd9ebdfff813444ab0622a025 8.0 MB SIG
Windows x86-64 executable installer Windows for AMD64/EM64T/x64 8f0f92d6154f9924414126ef770d1c7f 26.8 MB SIG
Windows x86-64 web-based installer Windows for AMD64/EM64T/x64 93e428bb5e5db43c0627a1ca00bbcfbf 1.3 MB SIG