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Python 3.7.3

Release Date: March 25, 2019

Note

There are now newer maintenance releases of Python 3.7 that supersede 3.7.3. Get the latest release of 3.7.x here.

Python 3.7.3 is the third 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. Use the 10.9 64-bit-only installer variant unless you are building Python applications that also need to work on older macOS systems. 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 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

Files

Version Operating System Description MD5 Sum File Size GPG
Gzipped source tarball Source release 2ee10f25e3d1b14215d56c3882486fcf 22973527 SIG
XZ compressed source tarball Source release 93df27aec0cd18d6d42173e601ffbbfd 17108364 SIG
macOS 64-bit/32-bit installer Mac OS X for Mac OS X 10.6 and later 5a95572715e0d600de28d6232c656954 34479513 SIG
macOS 64-bit installer Mac OS X for OS X 10.9 and later 4ca0e30f48be690bfe80111daee9509a 27839889 SIG
Windows help file Windows 7740b11d249bca16364f4a45b40c5676 8090273 SIG
Windows x86-64 embeddable zip file Windows for AMD64/EM64T/x64 854ac011983b4c799379a3baa3a040ec 7018568 SIG
Windows x86-64 executable installer Windows for AMD64/EM64T/x64 a2b79563476e9aa47f11899a53349383 26190920 SIG
Windows x86-64 web-based installer Windows for AMD64/EM64T/x64 047d19d2569c963b8253a9b2e52395ef 1362888 SIG
Windows x86 embeddable zip file Windows 70df01e7b0c1b7042aabb5a3c1e2fbd5 6526486 SIG
Windows x86 executable installer Windows ebf1644cdc1eeeebacc92afa949cfc01 25424128 SIG
Windows x86 web-based installer Windows d3944e218a45d982f0abcd93b151273a 1324632 SIG