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Python 3.6.0rc1

Release Date: Dec. 6, 2016

Python 3.6.0rc1

Python 3.6.0rc1 was released on 2016-12-06.

3.6.0rc1 is the first release candidate for the 3.6.0 release. Code for 3.6.0 is now frozen. Assuming no release critical problems are found prior to the 3.6.0 final release date, currently 2016-12-16, the 3.6.0 final release will be the same code base as this 3.6.0rc1. Maintenance releases for the 3.6 series will follow at regular intervals starting in the first quarter of 2017.

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 customisation 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

Please see What’s New In Python 3.6 for more information.

Note that 3.6.0rc1 is still a preview release and thus its use is not recommended for production environments.

Notes on this release

  • If you are building Python from source, beware that the OpenSSL 1.1.0c release, the most recent as of this update, is known to cause Python 3.6 test suite failures and its use should be avoided without additional patches. It is expected that the next release of the OpenSSL 1.1.0 series will fix these problems. See for more information.
  • 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".) They will not work on Intel Itanium Processors (formerly "IA-64").
  • Windows users: If installing Python 3.6.0 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.
  • OS X users: There is important information about IDLE, Tkinter, and Tcl/Tk on Mac OS X here.

Full Changelog


Version Operating System Description MD5 Sum File Size GPG
Gzipped source tarball Source release 9dadf6a0401c9af57c039eb086084479 21.2 MB SIG
XZ compressed source tarball Source release f079686c1b76052c96b38642ab341d2e 16.0 MB SIG
Mac OS X 64-bit/32-bit installer macOS for Mac OS X 10.6 and later 404c390ae27f067aaab34f168cf913eb 26.2 MB SIG
Windows help file Windows 85bb35327e9483b59199f3174af64102 7.7 MB SIG
Windows x86 embeddable zip file Windows d5f27483adb6fa7e3513ad174f469aa3 6.0 MB SIG
Windows x86 executable installer Windows 7f3d344c7f15e1d580663d74fd77ee09 29.3 MB SIG
Windows x86 web-based installer Windows c87f129d66434e6862a6c5d88c9d05cd 1.2 MB SIG
Windows x86-64 embeddable zip file Windows for AMD64/EM64T/x64 0984a2706d49df4597e48794175a7533 6.6 MB SIG
Windows x86-64 executable installer Windows for AMD64/EM64T/x64 5f4021a0c605bb75866bf6d069fa5760 30.2 MB SIG
Windows x86-64 web-based installer Windows for AMD64/EM64T/x64 5fb6456cd95b42b2fe979c18a4db0b4c 1.3 MB SIG