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Python 3.6.0rc2

Release Date: Dec. 16, 2016

Python 3.6.0rc2

Python 3.6.0rc2 was released on 2016-12-16.

3.6.0rc2 is the second 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 2016-12-23, the 3.6.0 final release will be the same code base as this 3.6.0rc2. 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 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

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

Note that 3.6.0rc2 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 a122a75b2b024539cb22b9b8452dddc7 22256774 SIG
XZ compressed source tarball Source release 89cae0fd4ecd7d813abb19924537323f 16807600 SIG
Mac OS X 64-bit/32-bit installer macOS for Mac OS X 10.6 and later 3c120bf3ab8a780e11b58bd0c13ca889 27520046 SIG
Windows help file Windows 7aca9b0f6fe91d6938b8aeab11267448 8052749 SIG
Windows x86-64 embeddable zip file Windows for AMD64/EM64T/x64 f9d6fd8d43476e4218f191a6dfc68ca1 6925484 SIG
Windows x86-64 executable installer Windows for AMD64/EM64T/x64 d216ea513fee6fc9c5b850d973534522 31664672 SIG
Windows x86-64 web-based installer Windows for AMD64/EM64T/x64 6a5d5d57c7275beff78267ae5a8d0c06 1312504 SIG
Windows x86 embeddable zip file Windows 02a7857452973b7f23fac062c48da10b 6315772 SIG
Windows x86 executable installer Windows 412571b29fb544397c3651f594d239d8 30718520 SIG
Windows x86 web-based installer Windows 02dea78aa08d63b29f1cac2378b1c761 1287088 SIG