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1. Download Python 3.5

For most Unix systems, you must download and compile the source code. The same source code archive can also be used to build the Windows and Mac versions, and is the starting point for ports to all other platforms. Download the latest Python 3 and Python 2 source.

Release Date: Nov. 2, 2019

Note: Python 3.5.9. has been superseded byPython 3.5.10.

Python 3.5.9 was released on November 1st, 2019.

There were no new changes in version 3.5.9; 3.5.9 was released only because of a CDN caching problem, which resulted in some users downloading a prerelease version of the 3.5.8 .xz source tarball. Apart from the version number, 3.5.9 is identical to the proper 3.5.8 release.

Python 3.5 has now entered 'security fixes only' mode, and as such the only changes since Python 3.5.4 are security fixes. Also, Python 3.5.9 has only been released in source code form; no more official binary installers will be produced.

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

More resources

• Change log for this release.
• Report bugs at http://bugs.python.org.
• Help fund Python and its community.

• 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.

Download Python 3.5