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 3.7.4rc1

Release Date: June 18, 2019

Python 3.7.4rc1 is the release candidate preview of the fourth 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.

Note that 3.7.4rc1 is a release preview and thus its use is not recommended for production environments.

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 3.7.4, 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. Changed in 3.7.4 The 64-bit/32-bit variant that also works on very old versions of macOS, from 10.6 (Snow Leopard) on, is now deprecated and will no longer be provided in future releases; see the macOS installer ReadMe file for more info. Both variants 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.
  • Both python.org installer variants include private copies of OpenSSL. Please carefully read the Important Information displayed during installation for information about SSL/TLS certificate validation and the Install Certificates.command. Changed in 3.7.4 OpenSSL has been updated from 1.1.0 to 1.1.1.

Full Changelog

Files

Version Operating System Description MD5 Sum File Size GPG
Gzipped source tarball Source release 4dcfff4a6d42aec1801d4ef2ff81879e 23018321 SIG
XZ compressed source tarball Source release 9154a412a900413fc55bfef7decb47a3 17145660 SIG
macOS 64-bit/32-bit installer Mac OS X for Mac OS X 10.6 and later 96615d71b69bab48998a36aee50eed79 34899343 SIG
macOS 64-bit installer Mac OS X for OS X 10.9 and later ffb05dafa9104b624df95b61a19f6033 28081540 SIG
Windows help file Windows e086341dd89138151db0f595c82ce735 8133630 SIG
Windows x86-64 embeddable zip file Windows for AMD64/EM64T/x64 fcfb20f1b7c1e5a5260f562d4824f473 7466510 SIG
Windows x86-64 executable installer Windows for AMD64/EM64T/x64 2ca42cdd3533290be290b7b0fa5bc3f5 26648568 SIG
Windows x86-64 web-based installer Windows for AMD64/EM64T/x64 d9ef504d4bf2c174a7d57025f3530872 1363008 SIG
Windows x86 embeddable zip file Windows d9c18c989c474c7629121c9d59cc429e 6711238 SIG
Windows x86 executable installer Windows 55551c8714fe2d374dfae944a463df1e 25630424 SIG
Windows x86 web-based installer Windows 7308e8f08ddba7c3cd814aedfccb67d9 1325256 SIG