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Python 3.6.4rc1

Release Date: 2017-12-05

Python 3.6.4rc1 is a release candidate preview of the fourth maintenance release of Python 3.6. The Python 3.6 series contains many new features and optimizations. See the What’s New In Python 3.6 document for more information.

Major new features of the 3.6 series, compared to 3.5

Among the new major new features in Python 3.6 are:

  • PEP 468, Preserving Keyword Argument Order
  • PEP 487, Simpler customization of class creation
  • PEP 495, Local Time Disambiguation
  • PEP 498, Literal String Formatting
  • PEP 506, Adding A Secrets Module To The Standard Library
  • PEP 509, Add a private version to dict
  • PEP 515, Underscores in Numeric Literals
  • PEP 519, Adding a file system path protocol
  • PEP 520, Preserving Class Attribute Definition Order
  • PEP 523, Adding a frame evaluation API to CPython
  • PEP 524, Make os.urandom() blocking on Linux (during system startup)
  • PEP 525, Asynchronous Generators (provisional)
  • PEP 526, Syntax for Variable Annotations (provisional)
  • PEP 528, Change Windows console encoding to UTF-8
  • PEP 529, Change Windows filesystem encoding to UTF-8
  • PEP 530, Asynchronous Comprehensions

Note that 3.6.4rc1 is a preview release and thus its use is not recommended for production environments.

More resources

Notes on this release

  • 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".)
  • Windows users: If installing Python 3.6 as a non-privileged user, you may need to escalate to administrator privileges to install an update to your C runtime libraries.
  • Windows users: There are now "web-based" installers for Windows platforms; the installer will download the needed software components at installation time.
  • Windows Users: 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: If you are using the Python 3.6 from the python.org binary installer linked on this page, please carefully read the Important Information displayed during installation; this information is also available after installation by clicking on /Applications/Python 3.6/ReadMe.rtf. There is important information there about changes in the 3.6 installer-supplied Python, particularly with regard to SSL certificate validation.
  • macOS users: There is important information about IDLE, Tkinter, and Tcl/Tk on macOS here.

Full Changelog

Files

Version Operating System Description MD5 Sum File Size GPG
Gzipped source tarball Source release bd16f116d637fa56219a48b5b2660197 22714448 SIG
XZ compressed source tarball Source release f04d0711a0bf23d4e21088e575edf3d6 17006764 SIG
Mac OS X 64-bit/32-bit installer Mac OS X for Mac OS X 10.6 and later 3576bffb842d0642e821626f9d1155ba 27782230 SIG
Windows help file Windows 353b14d860cb4d6a158c21fdd4eeb3c1 8043778 SIG
Windows x86-64 embeddable zip file Windows for AMD64/EM64T/x64, not Itanium processors ee3220f9deab515952623ce3dcfb058c 7162737 SIG
Windows x86-64 executable installer Windows for AMD64/EM64T/x64, not Itanium processors 2c8b93970e271a660959c3b70007171a 31686088 SIG
Windows x86-64 web-based installer Windows for AMD64/EM64T/x64, not Itanium processors 23cee496f375ac27f58e9342fb775c65 1320224 SIG
Windows x86 embeddable zip file Windows 1a158cc36dde7e75af059cc9e047c9af 6400768 SIG
Windows x86 executable installer Windows 74745ac513008dd8cc8bde6352692a94 30654200 SIG
Windows x86 web-based installer Windows 96c1cbbfe93749c652350a0426e32920 1294184 SIG