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Python 3.7.2rc1

Release Date: Dec. 11, 2018

Python 3.7.2rc1 is the release candidate preview of the second maintenance release of Python 3.7. The Python 3.7 series is the newest major release of the Python language and contains many new features and optimizations.

Among the major new features in Python 3.7 are:

  • PEP 539, new C API for thread-local storage
  • PEP 545, Python documentation translations
  • New documentation translations: Japanese, French, and Korean.
  • PEP 552, Deterministic pyc files
  • PEP 553, Built-in breakpoint()
  • PEP 557, Data Classes
  • PEP 560, Core support for typing module and generic types
  • PEP 562, Customization of access to module attributes
  • PEP 563, Postponed evaluation of annotations
  • PEP 564, Time functions with nanosecond resolution
  • PEP 565, Improved DeprecationWarning handling
  • PEP 567, Context Variables
  • Avoiding the use of ASCII as a default text encoding (PEP 538, legacy C locale coercion and PEP 540, forced UTF-8 runtime mode)
  • The insertion-order preservation nature of dict objects is now an official part of the Python language spec.
  • Notable performance improvements in many areas.

Please see What’s New In Python 3.7 for more information.

More resources

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".)
  • There are now "web-based" installers for Windows platforms; the installer will download the needed software components at installation time.
  • 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

  • For Python 3.7 releases, we provide two binary installer options for download. The default variant is 64-bit-only and works on macOS 10.9 (Mavericks) and later systems. We also continue to provide a 64-bit/32-bit variant that works on all versions of macOS from 10.6 (Snow Leopard) on. Both variants now come with batteries-included versions oF Tcl/Tk 8.6 for users of IDLE and other tkinter-based GUI applications; third-party and system versions of Tcl/Tk are no longer used. Consider using the newer 10.9 64-bit-only installer variant, unless you are building Python applications that also need to work on older macOS systems.
  • Both installer variants include private copies of OpenSSL 1.1.0. Please carefully read the Important Information displayed during installation for information about SSL/TLS certificate validation and the Install Certificates.command.

Full Changelog


Version Operating System Description MD5 Sum File Size GPG
Gzipped source tarball Source release 2e4b64758ca74118563586d415364980 21.8 MB SIG
XZ compressed source tarball Source release 7d1230c615a4fdd87fbaef3a0fb8ba68 16.3 MB SIG
macOS 64-bit/32-bit installer macOS for Mac OS X 10.6 and later fec58f37c12225de3add9248b7fe18e1 32.9 MB SIG
macOS 64-bit installer macOS for OS X 10.9 and later 01c4836bfdd225ebf008c83a9f906edf 26.5 MB SIG
Windows help file Windows 751e70d634d27a26310347ef4da33fd0 5.5 MB SIG
Windows x86-64 embeddable zip file Windows for AMD64/EM64T/x64 4f5557e14cad445c40ed7a5939fb8e81 6.8 MB SIG
Windows x86-64 executable installer Windows for AMD64/EM64T/x64 b9f5c413c183b2d937730290200d12b5 22.7 MB SIG
Windows x86-64 web-based installer Windows for AMD64/EM64T/x64 cd0ee71635bf64055f9b1cbebd745f12 1.3 MB SIG
Windows x86 embeddable zip file Windows 6f35716c278303ca20dfd41b16668672 6.3 MB SIG
Windows x86 executable installer Windows 53e054fbbec5bfea8f4c244a316e8ebe 22.0 MB SIG
Windows x86 web-based installer Windows bcf644bd4a8f597d97289f80bbe13d37 1.3 MB SIG