Release Date: April 6, 2013
Note: A newer bugfix release, 3.3.5, is currently available. Its use is recommended.
Python 3.3.1 was released on April 7th, 2013. This is a 3.3 series bugfix release. It includes hundreds of bugfixes over 3.3.0.
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
- Change log for this release.
- Online Documentation
- What's new in 3.3?
- 3.3 Release Schedule
- Report bugs at http://bugs.python.org.
- Help fund Python and its community.
This is a production release. Please report any bugs you encounter.
We currently support these formats for download:
- Bzipped source tar ball (3.3.1) (sig), ~ 14 MB
- XZ compressed source tar ball (3.3.1) (sig), ~ 11 MB
- Gzipped source tar ball (3.3.1) (sig), ~ 16 MB
- Windows x86 MSI Installer (3.3.1) (sig) and Visual Studio debug information files (sig)
- Windows X86-64 MSI Installer (3.3.1)  (sig) and Visual Studio debug information files (sig)
- Windows help file (sig)
- Mac OS X 64-bit/32-bit Installer (3.3.1) for Mac OS X 10.6 and later  (sig). [You may need an updated Tcl/Tk install to run IDLE or use Tkinter, see note 2 for instructions.]
- Mac OS X 32-bit i386/PPC Installer (3.3.1) for Mac OS X 10.5 and later  (sig)
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:
c19bfd6ea252b61779a4f2996fb3b330 16521332 Python-3.3.1.tgz fb7147a15359a941e0b048c641fd7123 13975626 Python-3.3.1.tar.bz2 993232d9f4d9b4863cc1ec69a792e9cd 11852964 Python-3.3.1.tar.xz f563b701466bbfddc9e228d6cd894647 26714664 python-3.3.1-pdb.zip 8141a751200213ea6279624120f099d6 22137206 python-3.3.1.amd64-pdb.zip 69ad9e442d33e8c2470b2b6c7575d6dd 20758528 python-3.3.1.amd64.msi 8c78e017ba32aafb00f6574c38d0101f 20217856 python-3.3.1.msi ef3058449389c4b77385e6637a911d87 6596709 python331.chm ec10c5be176faeda17382d3ce6739f32 19601538 python-3.3.1-macosx10.5.dmg b208b962515d49c7e236f6dce565a723 19700219 python-3.3.1-macosx10.6.dmg
|||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).|
|||(1, 2) There is important information about IDLE, Tkinter, and Tcl/Tk on Mac OS X here.|
|Version||Operating System||Description||MD5 Sum||File Size||GPG|
|bzip2 compressed source tarball||Source release||fb7147a15359a941e0b048c641fd7123||13975626||SIG|
|Gzipped source tarball||Source release||6a1050d8d9f924d05c499dbebcb8e6a6||68587520||SIG|
|XZ compressed source tarball||Source release||993232d9f4d9b4863cc1ec69a792e9cd||11852964||SIG|
|Mac OS X 32-bit i386/PPC installer||Mac OS X||for Mac OS X 10.5 and later||ec10c5be176faeda17382d3ce6739f32||19601538||SIG|
|Mac OS X 64-bit/32-bit installer||Mac OS X||for Mac OS X 10.6 and later||b208b962515d49c7e236f6dce565a723||19700219||SIG|
|Windows debug information files||Windows||f563b701466bbfddc9e228d6cd894647||26714664||SIG|
|Windows help file||Windows||ef3058449389c4b77385e6637a911d87||6596709||SIG|
|Windows x86-64 MSI installer||Windows||for AMD64/EM64T/x64, not Itanium processors||69ad9e442d33e8c2470b2b6c7575d6dd||20758528||SIG|
|Windows x86 MSI installer||Windows||8c78e017ba32aafb00f6574c38d0101f||20217856||SIG|