Python 3.1.1

Python 3.1.1 has been superseded by 3.1.2. You can download 3.1.2.

Python 3.1.1 was released on August 17th, 2009.

Python 3.1 is a continuation of the work started by Python 3.0, the new backwards-incompatible series of Python. Improvements in this release include:

• An ordered dictionary type
• Various optimizations to the int type
• New unittest features including test skipping and new assert methods.
• A much faster io module
• Tile support for Tkinter
• A pure Python reference implementation of the import statement
• New syntax for nested with statements

See these resources for further information:

• What's New in 3.1?
• What's new in Python 3000
• Python 3.1.1 Change Log
• Online Documentation
• Conversion tool for Python 2.x code: 2to3
• Report bugs at http://bugs.python.org.

Help fund Python and its community by donating to the Python Software Foundation.

Download

This is a production release.

We currently support these formats for download:

• Gzipped source tar ball (3.1.1) (sig)
• Bzipped source tar ball (3.1.1) (sig)
• Windows x86 MSI Installer (3.1.1) (sig)
• Windows X86-64 MSI Installer (3.1.1) [1] (sig)
• Mac Installer disk image (3.1.1) (sig)

The source tarballs are signed with Benjamin Peterson's key (fingerprint: 12EF 3DC3 8047 DA38 2D18 A5B9 99CD EA9D A413 5B38). The Windows installers are signed with Martin von Löwis' public key which has a key id of 7D9DC8D2. The public keys are located on the download page.

MD5 checksums and sizes of the released files:

f1317dbb2398374d6691edd5bff1b91d  11525876 python-3.1.1.tgz
d1ddd9f16e3c6a51c7208f33518cd674   9510105 python-3.1.1.tar.bz2
d31e3e91c2ddd3e5ea7c40abe436917e  14130176 python-3.1.1.amd64.msi
e05a6134b920ae86f0e33b8a43a801b3  13737984 python-3.1.1.msi
9c7f85cc7fb5a2fa533d338c88229633  17148746 python-3.1.1.dmg