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Python 3.5.0a1

Warning: Python 3.5.0 reached end-of-life on 2020-09-30. It is no longer supported and does not receive security updates. We recommend upgrading to the latest Python release.
Note: Python 3.5.0a1 has been superseded by Python 3.5.10.

Release date: Feb. 8, 2015

Python 3.5.0a1

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

Python 3.5.0a1 was released on February 8th, 2015.

Major new features of the 3.5 series, compared to 3.4

Python 3.5 is still in development, and 3.5.0a1 is the first alpha release. Many new features are still being planned and written. Among the new major new features and changes in the 3.4 release series so far are

  • PEP 461, adding support for "%-formatting" for bytes and bytearray objects
  • PEP 465, a new operator (@) for matrix multiplication
  • PEP 475, adding support for automatic retries of interrupted system calls

Download

Notes on this release:

  • The OS X installers are now distributed as signed installer package files compatible with the OS X Gatekeeper security feature.
  • There are now "web-based" installers for Windows platforms; the installer does not contain Python, but instead downloads just the needed su at installation time.
  • The Windows binaries were built with Microsoft Visual Studio 2015, which is not yet officially released. (It's currently offered in "Preview" mode, which is akin to a "beta".) It is our intention to ship Python 3.5 using VS2015, although right now VS2015's final release date is unclear.
  • 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").
  • There is important information about IDLE, Tkinter, and Tcl/Tk on Mac OS X here.

Full Changelog

Files

macOS

Download Mac OS X 64-bit/32-bit installer

Source release

Download XZ compressed source tarball

Version Operating system Description File size GPG MD5 checksum
Gzipped source tarball Source release 19.0 MB SIG f1ea32ce88ffff8787ea31302e00b05a
XZ compressed source tarball Source release 14.0 MB SIG 3113a8138146bdc71f4eb328130f601b
Mac OS X 32-bit i386/PPC installer macOS for Mac OS X 10.5 and later 24.0 MB SIG db2cc92ee6b231716a690900d80eaa65
Mac OS X 64-bit/32-bit installer macOS for Mac OS X 10.6 and later 22.5 MB SIG 81282502c8a5c04e9efb64b24ae106b3
Windows help file Windows 7.2 MB e306ad10de67f9823d53c8b8b5eb736a
Windows x86 executable installer Windows 21.1 MB d8457a909f1d2d5711f245df00725640
Windows x86 web-based installer Windows 869.6 KB 05e061e417cf311534c8a17ddc943c2b
Windows x86-64 executable installer Windows for AMD64/EM64T/x64 21.8 MB e62c943c1ebf9143bef93b51671a11d9
Windows x86-64 web-based installer Windows for AMD64/EM64T/x64 894.8 KB 34e88bb7ee92706371160dd29b2f3f75