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Python 3.3.2 Release

Python 3.3.2

Note: A newer security-fix release, 3.3.7, is currently available. Its use is recommended.

Python 3.3.2 was released on May 15th, 2013. This release fixes a few regressions found in Python 3.3.1.

Major new features of the 3.3 series, compared to 3.2

Python 3.3 includes a range of improvements of the 3.x series, as well as easier porting 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 distinction between "wide" and "narrow" Unicode builds)
  • A C implementation of the "decimal" module, with up to 120x speedup for 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 significantly saves 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 (see PEP 411) policy that adds much improved unicode support for email header parsing
  • A "collections.ChainMap" class for linking mappings to a single unit
  • Wrappers for many more POSIX functions in the "os" and "signal" modules, as well as other useful functions such as "sendfile()"
  • Hash randomization, introduced in earlier bugfix releases, is now switched on by default


This is a production release. Please report any bugs you encounter.

We currently support these formats for download:

The source tarballs are signed with Georg Brandl's key, which has a key id of 36580288; the fingerprint is 26DE A9D4 6133 91EF 3E25 C9FF 0A5B 1018 3658 0288. The Windows installer was signed by Martin von Löwis' public key, which has a key id of 7D9DC8D2. The Mac installers were signed with Ned Deily's key, which has a key id of 6F5E1540. The public keys are located on the download page.

MD5 checksums and sizes of the released files:

0a2ea57f6184baf45b150aee53c0c8da  16530940  Python-3.3.2.tgz
7dffe775f3bea68a44f762a3490e5e28  13983134  Python-3.3.2.tar.bz2
c94b78ea3b68a9bbc9906af4d5b4fdc7  11847676  Python-3.3.2.tar.xz
9d6094d54f5200d9c13d11c98d283cfe  19618740  python-3.3.2-macosx10.5.dmg
ce63202f4a6caa956dac2116e21a29f4  19709642  python-3.3.2-macosx10.6.dmg
2a3911ed48b54ce0a25683c72154a5ca  27025960
7ed2a017ae4f24413c9933dfba755364  22137206
2477b4bd8e9a337705f7b5fda8b3b45f  20774912  python-3.3.2.amd64.msi
0d9db9c2316562c62e1e4c347b6f9430  20238336  python-3.3.2.msi
e7eb67a7defbed74cbcf08b574f01f52   6605621  python332.chm
[1]The binaries for AMD64 will also work on processors that implement the Intel 64 architecture (formerly EM64T), i.e. the architecture that Microsoft calls x64, and AMD called x86-64 before calling it AMD64. They will not work on Intel Itanium Processors (formerly IA-64).
[2](1, 2) There is important information about IDLE, Tkinter, and Tcl/Tk on Mac OS X here.