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Python 3.5.1rc1

Release Date: Nov. 23, 2015

Python 3.5.1rc1

Python 3.5 has reached end-of-life. Python 3.5.10, the final release of the 3.5 series, is available here.

Python 3.5.1rc1 was released on November 22th, 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 e6dc75746e2237542684d01c3806a572 19.2 MB SIG
XZ compressed source tarball Source release ee1f4214f7347e015028bfcb989bae8f 14.2 MB SIG
Mac OS X 32-bit i386/PPC installer macOS for Mac OS X 10.5 and later a51b5aa2fdbf88cd10b2f60e5a27abc8 24.5 MB SIG
Mac OS X 64-bit/32-bit installer macOS for Mac OS X 10.6 and later e8eec5d3386e1d279f2c63ee79b2b887 22.9 MB SIG
Windows help file Windows 07ba691789f78f459d51ee383579ea02 7.4 MB SIG
Windows x86 embeddable zip file Windows dd2637c59a38368992ed0f459d52f6ec 5.7 MB SIG
Windows x86 executable installer Windows a31e2085b80521bd4b697f62124235dd 27.4 MB SIG
Windows x86 web-based installer Windows d1428899c10ea678301404660b7a74ad 915.5 KB SIG
Windows x86-64 embeddable zip file Windows for AMD64/EM64T/x64 8722fed99f3d0b02e0e5c40e6234543a 6.5 MB SIG
Windows x86-64 executable installer Windows for AMD64/EM64T/x64 a6c00bf2265d058963db667b6999c4ea 28.3 MB SIG
Windows x86-64 web-based installer Windows for AMD64/EM64T/x64 21cceca439daa403af880abfc287829c 940.7 KB SIG