The 3.0 version of Python is called Python 3000, or py3k, in the development phase. This is a large upgrade relative to earlier versions of Python. In order not to bring in too much baggage, Python 3.0 is not considered backward compatible at design time. Many programs designed for earlier versions of Python do not work properly on Python 3.0. To take care of existing programs, Python 2.6, as a transitional version, basically uses the Python 2.x syntax and library, taking into account the migration to Python 3.0. Programs that work properly on Python 2.6 without warning based on early Python versions can be seamlessly migrated to Python 3.0 through a 2 to 3 conversion tool.
Python 3.1.4 Release Notes:
The Python 3.1 version series is a continuation to the work started by Python 3.0, the new backwards-incompatible series of Python . For ongoing maintenance releases, please do not have the Python 3.2 series. Improvements in the "3.1 series release include:
An ordered dictionary type various optimizations to the INT type New mainframe features including test skipping and New assert Methods. A much faster IO module http://www.aliyun.com/zixun/aggregation/19680.html ' >tile support for Tkinter a pure Python Reference implementation of the import statement New syntax for nested with statements
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Gzipped Source tar Ball (3.1.4) (SIG) bzipped source tar Ball (3.1.4) (SIG) XZ source tar Ball (3.1.4) (SIG) Windows x86 MSI instal Ler (3.1.4) (SIG) Windows x86 MSI program Database (3.1.4) (SIG) Windows were MSI Installer (3.1.4) [1] (SIG) Windows were Program Database (3.1.4) [1] (SIG) Mac OS X 32-bit i386/ppc Installer (3.1.4) for MAC OS X 10.3 through 10.6 [2] (SIG)
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