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Python 3.5.3

Release Date: 2017-01-17

Python 3.5.3

Python 3.5.3 was released on January 17th, 2017.

Major new features of the 3.5 series, compared to 3.4

Among the new major new features and changes in the 3.5 release series are

  • PEP 441, improved Python zip application support
  • PEP 448, additional unpacking generalizations
  • PEP 461, "%-formatting" for bytes and bytearray objects
  • PEP 465, a new operator (@) for matrix multiplication
  • PEP 471, os.scandir(), a fast new directory traversal function
  • PEP 475, adding support for automatic retries of interrupted system calls
  • PEP 479, change StopIteration handling inside generators
  • PEP 484, the typing module, a new standard for type annotations
  • PEP 485, math.isclose(), a function for testing approximate equality
  • PEP 486, making the Windows Python launcher aware of virtual environments
  • PEP 488, eliminating .pyo files
  • PEP 489, a new and improved mechanism for loading extension modules
  • PEP 492, coroutines with async and await syntax

Notes on this release

  • 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 3.5.1 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.
  • Windows users: Some virus scanners (most notably "Microsoft Security Essentials") are flagging "Lib/distutils/command/wininst-14.0.exe" as malware. This is a "false positive": the file does not contain any malware. We build it ourselves, from source, on a known-clean system. We've asked that this false positive report be removed, and expect action soon. In the meantime, please don't be alarmed to see this warning when installing Python 3.5.2, or when scanning any earlier version of 3.5.
  • OS X users: The OS X installers are now distributed as signed installer package files compatible with the OS X Gatekeeper security feature.
  • 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 6192f0e45f02575590760e68c621a488 20656090 SIG
XZ compressed source tarball Source release 57d1f8bfbabf4f2500273fb0706e6f21 15213396 SIG
Mac OS X 32-bit i386/PPC installer Mac OS X for Mac OS X 10.5 and later 4994f588ebad17c4bf12148729b430d5 26385455 SIG
Mac OS X 64-bit/32-bit installer Mac OS X for Mac OS X 10.6 and later 6f9ee2ad1fceb1a7c66c9ec565e57102 24751146 SIG
Windows help file Windows 91600322a55cff692dd7fbcb2fb0d841 7794982 SIG
Windows x86-64 embeddable zip file Windows for AMD64/EM64T/x64 1264131c4c2f3f935f34c455bceedee1 6913264 SIG
Windows x86-64 executable installer Windows for AMD64/EM64T/x64 333d536b5f76f95a6118fb2ecd623351 30261960 SIG
Windows x86-64 web-based installer Windows for AMD64/EM64T/x64 b6be1ce6e69ac7dcdfb3316c91bebd95 974352 SIG
Windows x86 embeddable zip file Windows 7dbd6043bd041ed3db738ad90b6d697f 6087892 SIG
Windows x86 executable installer Windows 2f5c4eed044a49f507ac64ad6f6abf80 29347880 SIG
Windows x86 web-based installer Windows 80c2aff5d76767a5a566da01d72744b7 948992 SIG