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Python 3.5.1

Release Date: 2015-12-07

Python 3.5.1

Python 3.5.1 was released on December 6th, 2015.

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.
  • 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 be78e48cdfc1a7ad90efff146dce6cfe 20143759 SIG
XZ compressed source tarball Source release e9ea6f2623fffcdd871b7b19113fde80 14830408 SIG
Mac OS X 32-bit i386/PPC installer Mac OS X for Mac OS X 10.5 and later c66bddc2a4a560496e68fb16600143a7 25709672 SIG
Mac OS X 64-bit/32-bit installer Mac OS X for Mac OS X 10.6 and later 1c41a4bd7e6644b8680fc2508cebf1ed 24038487 SIG
Windows help file Windows cc3e73cbe2d71920483923b731710391 7719456 SIG
Windows x86-64 embeddable zip file Windows for AMD64/EM64T/x64, not Itanium processors b07d15f515882452684e0551decad242 6832590 SIG
Windows x86-64 executable installer Windows for AMD64/EM64T/x64, not Itanium processors 863782d22a521d8ea9f3cf41db1e484d 29627072 SIG
Windows x86-64 web-based installer Windows for AMD64/EM64T/x64, not Itanium processors 6a14ac8dfb70017c07b8f6cb622daa1a 963360 SIG
Windows x86 embeddable zip file Windows 6e783d8fd44570315d488b9a9881ff10 6023182 SIG
Windows x86 executable installer Windows 4d6fdb5c3630cf60d457c9825f69b4d7 28743504 SIG
Windows x86 web-based installer Windows 6dfcc4012c96d84f0a83d00cfddf8bb8 937680 SIG