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Python 3.7.1

Release Date: 2018-10-20

Python 3.7.1 is the first 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 99f78ecbfc766ea449c4d9e7eda19e83 22802018 SIG
XZ compressed source tarball Source release 0a57e9022c07fad3dadb2eef58568edb 16960060 SIG
macOS 64-bit/32-bit installer Mac OS X for Mac OS X 10.6 and later ac6630338b53b9e5b9dbb1bc2390a21e 34360623 SIG
macOS 64-bit installer Mac OS X for OS X 10.9 and later b69d52f22e73e1fe37322337eb199a53 27725111 SIG
Windows help file Windows b5ca69aa44aa46cdb8cf2b527d699740 8534435 SIG
Windows x86-64 embeddable zip file Windows for AMD64/EM64T/x64 74f919be8add2749e73d2d91eb6d1da5 6879900 SIG
Windows x86-64 executable installer Windows for AMD64/EM64T/x64 4c9fd65b437ad393532e57f15ce832bc 26260496 SIG
Windows x86-64 web-based installer Windows for AMD64/EM64T/x64 6d866305db7e3d523ae0eb252ebd9407 1333960 SIG
Windows x86 embeddable zip file Windows aa4188ea480a64a3ea87e72e09f4c097 6377805 SIG
Windows x86 executable installer Windows da24541f28e4cc133c53f0638459993c 25537464 SIG
Windows x86 web-based installer Windows 20b163041935862876433708819c97db 1297224 SIG