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Python 3.5.0b4

Release Date: July 26, 2015

Python 3.5.0b4

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

Python 3.5.0b4 was released on July 26th, 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 448, additional unpacking generalizations
  • PEP 461, adding support for "%-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 486, making the Windows Python launcher aware of virtual environments
  • PEP 488, eliminating .pyo files
  • PEP 489, multi-phase extension module initialization
  • PEP 492, coroutines with async and await syntax

Python 3.5 has now entered "feature freeze". By default new features may no longer be added to Python 3.5.

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 3.5.0b1 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 does not contain Python, but instead downloads just the needed software at installation time.
  • Windows users: 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.
  • 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 98cf14f87710aa34dd523b5ab84dcae2 19980637 SIG
XZ compressed source tarball Source release 17a44df9ec94cfb00cad7c57256d4208 14755880 SIG
Mac OS X 32-bit i386/PPC installer macOS for Mac OS X 10.5 and later 47a66b00ee784bc8b87e4c310b31d376 25418851 SIG
Mac OS X 64-bit/32-bit installer macOS for Mac OS X 10.6 and later 14e3b40cc9d715324f3fdf155f13b1b3 23751784 SIG
Windows help file Windows 70b275953d593c58e8f321869ee06bb3 7615692 SIG
Windows x86-64 embeddable zip file Windows for AMD64/EM64T/x64 b4dc03c7405540dc3f9898ae4c68660f 8361938 SIG
Windows x86-64 executable installer Windows for AMD64/EM64T/x64 b453bf4ce18924bed43eb5481e63238f 29455808 SIG
Windows x86-64 web-based installer Windows for AMD64/EM64T/x64 8fb241651fd72e01bf33f6c74dcd4e70 787992 SIG
Windows x86 embeddable zip file Windows 09c113f761e6c3d46d3961d907a903da 7522474 SIG
Windows x86 executable installer Windows b47dd2e3c41cf60af2e8c4b1a2b3f405 28451168 SIG
Windows x86 web-based installer Windows 59acaf9e5a329d1a8a0bafd4fd879b76 783624 SIG