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Python 3.7.0a1

Warning: Python 3.7.0 reached end-of-life on 2023-06-27. It is no longer supported and does not receive security updates. We recommend upgrading to the latest Python release.
Note: Python 3.7.0a1 has been superseded by Python 3.7.17.

Release date: Sept. 19, 2017

This is an early developer preview of Python 3.7

Major new features of the 3.7 series, compared to 3.6

Python 3.7 is still in development. This releasee, 3.7.0a1 is the first 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 (2018-01-29) and, if necessary, may be modified or deleted up until the release candidate (2018-05-21) . Please keep in mind that this is a preview release and its use is not recommended for production environments.

Many new features for Python 3.7 are still being planned and written. Among the new major new features and changes so far:

  • PEP 538, Coercing the legacy C locale to a UTF-8 based locale

The next pre-release of Python 3.7 will be 3.7.0a2, currently scheduled for 2017-10-16.

More resources

Notes on this release

  • Windows users: The binaries for AMD64 will also work on processors that implement the Intel 64 architecture. (Also known as the "x64" architecture, and formerly known as both "EM64T" and "x86-64".)
  • Windows users: If installing Python 3.7 as a non-privileged user, you may need to escalate to administrator privileges to install an update to your C runtime libraries.
  • Windows users: There are now "web-based" installers for Windows platforms; the installer will download the needed software components at installation time.
  • Windows Users: There are redistributable zip files containing the Windows builds, making it easy to redistribute Python as part of another software package. Please see the documentation regarding Embedded Distribution for more information.
  • macOS users: If you are using the Python 3.7 from the python.org binary installer linked on this page, please carefully read the Important Information displayed during installation; this information is also available after installation by clicking on /Applications/Python 3.7/ReadMe.rtf. There is important information there about changes in the 3.7 installer-supplied Python, particularly with regard to SSL certificate validation.
  • macOS users: There is important information about IDLE, Tkinter, and Tcl/Tk on macOS here.

Full Changelog

Files

macOS

Download Mac OS X 64-bit/32-bit installer

Windows

Download Python install manager

Source release

Download XZ compressed source tarball

Version Operating system Description File size GPG MD5 checksum
Gzipped source tarball Source release 20.6 MB SIG f16dda6e0f78e17b2afa87bf5504bfa7
XZ compressed source tarball Source release 15.5 MB SIG ab4a7f93f9a788868f8f429a461f966e
Mac OS X 64-bit/32-bit installer macOS for Mac OS X 10.6 and later 26.5 MB SIG 62d849319bf424a4a3cd46c48c9892f9
Windows help file Windows 7.7 MB SIG 154adcbeddecec152e44abb2b6882a92
Windows x86 embeddable zip file Windows 5.9 MB SIG ea82fc2e2f5138290a3e8e4e7e764bad
Windows x86 executable installer Windows 29.8 MB SIG 9bedbbfec870fcafa060a2d08a6d5bf4
Windows x86 web-based installer Windows 1.2 MB SIG 32dcafc7c4a507047ba2f684aff130a9
Windows x86-64 embeddable zip file Windows for AMD64/EM64T/x64, not Itanium processors 6.4 MB SIG 09e47034bfc6f1ebba495eaf9a0fc504
Windows x86-64 executable installer Windows for AMD64/EM64T/x64, not Itanium processors 30.5 MB SIG 3a37fa9539393b5d84e45c3062e1b6a6
Windows x86-64 web-based installer Windows for AMD64/EM64T/x64, not Itanium processors 1.3 MB SIG 6f8c5f77a75e69f2afc1a75478435bf3