Release Date: Sept. 19, 2017

Release Date: July 20, 2020. This is the fifth maintenance release of Python 3.8. Note: The release you're looking at is Python 3.8.5, a bugfix release for the legacy 3.8 series. Python 3.9 is now the latest feature release series of Python 3. Get the latest release of 3.9.x here. Release Date: Sept. 19, 2017 Python 3.3.x has reached end-of-life. This is its final release. It is a security-fix source-only release. Python 3.3.0 was released on 2012-09-29 and has been in security-fix-only mode since 2014-03-08. Using a Mac with at least OS X 10.6.8 installed, access the Mac App Store and download the Lion (10.7) or Mountain Lion (10.8) app installer. Insert the USB drive into the Mac and launch Disk.

Python 3.3.x has reached end-of-life. This is its final release.It is a security-fix source-only release.

Python 3.3.0 was released on 2012-09-29 and has been in security-fix-only mode since 2014-03-08. Per Python Development policy, all support for the 3.3 series of releases ended on 2017-09-29, five years after the initial release. This release, Python 3.3.7, was the final release for the 3.3 series.

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After 2017-09-29, we no longer accept bug reports nor provide fixes of any kind for Python 3.3.x (third-party distributors of Python 3.3.x may choose to offer their own extended support). Because 3.3.x has long been in security-fix mode, 3.3.7 may no longer build correctly on all current operating system releases and some tests may fail. If you are still using Python 3.3.x, we strongly encourage you to upgrade to a more recent, fully supported version of Python 3; see https://www.python.org/downloads/.

Python 3.3 includes a range of improvements of the 3.x series, as well as easierporting between 2.x and 3.x.

• PEP 380, syntax for delegating to a subgenerator (yield from)
• PEP 393, flexible string representation (doing away with the distinctionbetween 'wide' and 'narrow' Unicode builds)
• A C implementation of the 'decimal' module, with up to 120x speedupfor decimal-heavy applications
• The import system (__import__) is based on importlib by default
• The new 'lzma' module with LZMA/XZ support
• PEP 397, a Python launcher for Windows
• PEP 405, virtual environment support in core
• PEP 420, namespace package support
• PEP 3151, reworking the OS and IO exception hierarchy
• PEP 3155, qualified name for classes and functions
• PEP 409, suppressing exception context
• PEP 414, explicit Unicode literals to help with porting
• PEP 418, extended platform-independent clocks in the 'time' module
• PEP 412, a new key-sharing dictionary implementation that significantlysaves memory for object-oriented code
• PEP 362, the function-signature object
• The new 'faulthandler' module that helps diagnosing crashes
• The new 'unittest.mock' module
• The new 'ipaddress' module
• The 'sys.implementation' attribute
• A policy framework for the email package, with a provisional (seePEP 411) policy that adds much improved unicode support for emailheader parsing
• A 'collections.ChainMap' class for linking mappings to a single unit
• Wrappers for many more POSIX functions in the 'os' and 'signal' modules, aswell as other useful functions such as 'sendfile()'
• Hash randomization, introduced in earlier bugfix releases, is nowswitched on by default

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

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