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Python 3.6.6

Release Date: 2018-06-27

Python 3.6.6 is the sixth and current maintenance release of Python 3.6. The Python 3.6 series contains many new features and optimizations.

Note

Python 3.7.0 is now released and is the latest feature release of Python 3. Get 3.7.0 here. We plan to continue to provide bug-fix releases for 3.6.x though at least the end of 2018 and security fixes through 2021.

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.

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".)
  • 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.
  • 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

  • NEW as of 3.6.5: we are providing two binary installer options for download. The new variant works on macOS 10.9 (Mavericks) and later systems and comes with its own batteries-included version oF Tcl/Tk 8.6 for users of IDLE and other tkinter-based GUI applications. It is 64-bit only as Apple is deprecating 32-bit support in future macOS releases. For 3.6.5+, the 10.9+ variant is offered as an additional more modern alternative to the traditional 10.6+ variant in earlier 3.6.x releases. The 10.6+ variant still requires installing a third-party version of Tcl/Tk 8.5. If you are using macOS 10.9 or later, consider using the new installer variant, unless you are building Python applications that also need to work on older macOS systems. Binary extension modules (including wheels) built for earlier versions of 3.6.x with the 10.6 variant should continue to work with either 3.6.6 variant without recompilation.
  • Both python.org installer variants include private copies of OpenSSL 1.0.2. Please carefully read the Important Information displayed during installation for information about SSL/TLS certificate validation and the Install Certificates.command.

Full Changelog

Files

Version Operating System Description MD5 Sum File Size GPG
Gzipped source tarball Source release 9a080a86e1a8d85e45eee4b1cd0a18a2 22930752 SIG
XZ compressed source tarball Source release c3f30a0aff425dda77d19e02f420d6ba 17156744 SIG
macOS 64-bit/32-bit installer Mac OS X for Mac OS X 10.6 and later c58267cab96f6d291d332a2b163edd33 28060853 SIG
macOS 64-bit installer Mac OS X for OS X 10.9 and later 3ad13cc51c488182ed21a50050a38ba7 26954940 SIG
Windows help file Windows e01b52e24494611121b4a866932b4123 8139973 SIG
Windows x86-64 embeddable zip file Windows for AMD64/EM64T/x64 7148ec14edfdc13f42e06a14d617c921 7186734 SIG
Windows x86-64 executable installer Windows for AMD64/EM64T/x64 767db14ed07b245e24e10785f9d28e29 31930528 SIG
Windows x86-64 web-based installer Windows for AMD64/EM64T/x64 f30be4659721a0ef68e29cae099fed6f 1319992 SIG
Windows x86 embeddable zip file Windows b4c424de065bad238c71359f3cd71ef2 6401894 SIG
Windows x86 executable installer Windows 467161f1e894254096f9a69e2db3302c 30878752 SIG
Windows x86 web-based installer Windows a940f770b4bc617ab4a308ff1e27abd6 1293456 SIG