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Python 3.7.5rc1

Release Date: Oct. 2, 2019

Python 3.7.5rc1 is the release candidate preview of the fifth maintenance release of Python 3.7. The Python 3.7 series is the latest major release of the Python language and contains many new features and optimizations.

Note that 3.7.5rc1 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 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.
  • At the time of the release of this release candidate, the next release of macOS, 10.15 Catalina, was still in public beta. Any updates needed to support 10.15 will be provided after it releases.

Full Changelog


Version Operating System Description MD5 Sum File Size GPG
Gzipped source tarball Source release f89580b54f77b3a0049f63526e817f65 23128023 SIG
XZ compressed source tarball Source release 1e0f79c40c1316e4be1d69b839d93774 17238100 SIG
macOS 64-bit/32-bit installer macOS for Mac OS X 10.6 and later 8c1cd3c02663e411425b7fb323f48d2c 35023052 SIG
macOS 64-bit installer macOS for OS X 10.9 and later 4eb58f4ab6130e4c26d88df4bda250c4 28196507 SIG
Windows help file Windows 89a9936ebc70a454915152321c900a47 8139888 SIG
Windows x86-64 embeddable zip file Windows for AMD64/EM64T/x64 f7cf3104d1590aaa714baf50fc055827 7500433 SIG
Windows x86-64 executable installer Windows for AMD64/EM64T/x64 0815f10825fa65c2efee83fdf6138572 26776400 SIG
Windows x86-64 web-based installer Windows for AMD64/EM64T/x64 2eeed8a54170b18434e531ab0bdf02d7 1363016 SIG
Windows x86 embeddable zip file Windows 3ebe962695f40e24529c5db350cee18f 6745077 SIG
Windows x86 executable installer Windows 0d21c62b75de23b72d4a99799e99602f 25763688 SIG
Windows x86 web-based installer Windows 3fce0f741f69fac391756da24cbe3a6a 1325288 SIG