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Python 2.7.1

Release Date: Nov. 27, 2010

Note: A newer bugfix release, 2.7.2, is currently available. Its use is recommended.

Python 2.7.1 was released on November 27th, 2010.

The Python 2.7 series is scheduled to be the last major version in the 2.x series before 2.x moves into an extended maintenance period. This release contains many of the features that were first released in Python 3.1. Improvements in this release include:

  • 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

See these resources for further information:


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 Ronald Oussoren's key, which has a key id of E6DF025C. The public keys are located on the download page.

MD5 checksums and sizes of the released files:

15ed56733655e3fab785e49a7278d2fb  14058131  Python-2.7.1.tgz
aa27bc25725137ba155910bd8e5ddc4f  11722546  Python-2.7.1.tar.bz2
c7a750e85e632294c9b527ee8358d805  16065602
ef24194913837f2f542883fd52f3af99  17196098
c4eb466b9d01fde770097a559445e33b  16333824  python-2.7.1.amd64.msi
a69ce1b2d870be29befd1cefb4615d82  16003072  python-2.7.1.msi
aa399c743796a519148d08b77fab0fe7  21429186  python-2.7.1-macosx10.3.dmg
723b12ec324fafb7b4a12f102c744ae7  18529455  python-2.7.1-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.

Full Changelog


Version Operating System Description MD5 Sum File Size GPG
Gzipped source tarball Source release 8e09bf989281c1a299cb2467b50a3699 60.3 MB SIG
bzip2 compressed source tarball Source release aa27bc25725137ba155910bd8e5ddc4f 11.2 MB SIG
Mac OS X 32-bit i386/PPC installer macOS for Mac OS X 10.3 and later aa399c743796a519148d08b77fab0fe7 20.4 MB SIG
Mac OS X 64-bit/32-bit installer macOS for Mac OS X 10.6 and later 723b12ec324fafb7b4a12f102c744ae7 17.7 MB SIG
Windows debug information files Windows c7a750e85e632294c9b527ee8358d805 15.3 MB SIG
Windows x86 MSI installer Windows a69ce1b2d870be29befd1cefb4615d82 15.3 MB SIG
Windows x86-64 MSI installer Windows for AMD64/EM64T/x64 c4eb466b9d01fde770097a559445e33b 15.6 MB SIG