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Python 3.6.4rc1

Warning: Python 3.6.4 reached end-of-life on 2021-12-23. It is no longer supported and does not receive security updates. We recommend upgrading to the latest Python release.
Note: Python 3.6.4rc1 has been superseded by Python 3.6.15.

Release date: Dec. 5, 2017

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

macOS

Download Mac OS X 64-bit/32-bit installer

Windows

Download Python install manager

Source release

Download XZ compressed source tarball

Version Operating system Description File size GPG MD5 checksum
Gzipped source tarball Source release 21.7 MB SIG bd16f116d637fa56219a48b5b2660197
XZ compressed source tarball Source release 16.2 MB SIG f04d0711a0bf23d4e21088e575edf3d6
Mac OS X 64-bit/32-bit installer macOS for Mac OS X 10.6 and later 26.5 MB SIG 3576bffb842d0642e821626f9d1155ba
Windows help file Windows 7.7 MB SIG 353b14d860cb4d6a158c21fdd4eeb3c1
Windows x86 embeddable zip file Windows 6.1 MB SIG 1a158cc36dde7e75af059cc9e047c9af
Windows x86 executable installer Windows 29.2 MB SIG 74745ac513008dd8cc8bde6352692a94
Windows x86 web-based installer Windows 1.2 MB SIG 96c1cbbfe93749c652350a0426e32920
Windows x86-64 embeddable zip file Windows for AMD64/EM64T/x64, not Itanium processors 6.8 MB SIG ee3220f9deab515952623ce3dcfb058c
Windows x86-64 executable installer Windows for AMD64/EM64T/x64, not Itanium processors 30.2 MB SIG 2c8b93970e271a660959c3b70007171a
Windows x86-64 web-based installer Windows for AMD64/EM64T/x64, not Itanium processors 1.3 MB SIG 23cee496f375ac27f58e9342fb775c65