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Python 2.7.4 Release

Python 2.7.4

Note: A newer bugfix release, 2.7.5, is currently available. Its use is recommended over previous versions of 2.7.

Python 2.7.4 was released on April 6, 2013. This is a 2.7 series bugfix release. It includes hundreds of bugfixes over 2.7.3.

About the 2.7 release series

Among the features and improvements to Python 2.6 introduced in the 2.7 series are

  • An ordered dictionary type
  • New unittest features including test skipping, new assert methods, and test discovery
  • A much faster io module
  • Automatic numbering of fields in the str.format() method
  • Float repr improvements backported from 3.x
  • Tile support for Tkinter
  • A backport of the memoryview object from 3.x
  • Set literals
  • Set and dictionary comprehensions
  • Dictionary views
  • New syntax for nested with statements
  • The sysconfig module


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

We currently support these formats for download:

The source tarballs are signed with Benjamin Peterson's key (fingerprint: 12EF 3DC3 8047 DA38 2D18 A5B9 99CD EA9D A413 5B38). 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:

592603cfaf4490a980e93ecb92bde44a  14489063  Python-2.7.4.tgz
62704ea0f125923208d84ff0568f7d50  12146770  Python-2.7.4.tar.bz2
86909785aa1ff13b49d87737b75b5f54  10250644  Python-2.7.4.tar.xz
bb475605feffd85194902d5cc0ce62d6  18105410
a46a49e0f44caffd0084d032ab0447f8  17450050
7c44c508a1594a8be8145d172b056b90  16625664  python-2.7.4.amd64.msi
4610171c0dbc22712d597f808dcb8d37  16232448  python-2.7.4.msi
eff74952b544c77316982bb660eebbda   6003987  python274.chm
05314675faa1aa4d1b7ec0e8b21355a0  20397182  python-2.7.4-macosx10.3.dmg
bf586a6e7419bf1f222babbfe5177208  19985319  python-2.7.4-macosx10.6.dmg
[1](1, 2) 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.