A Developer's Guide to Python 3.0: Core Language Changes
In this deep comparison between Python 2.x and Python 3.0, discover the far-reaching changes to the Python core language, type system, and the standard library, how they'll affect your code, and guidelines for migration.
by Gigi Sayfan
March 25, 2009
ython 3.0, a.k.a Python 3000, a.k.a Python 3K, is out. It aims to fix the language design problems accumulated over the Python 2.x's lifetime, and to clean up the language and its standard library. But this upgrade is a bitter pill for developers to swallow, because Python 3.0 is not backward compatible with Python 2.x. Python 3.0 even breaks the venerable "hello world!" program.
But there's some sugar to go with that medicine, too. Python 2 developers were not abandoned completely. Python 2.6 was released a few months prior to Python 3.0 and it aims to help in the migration process. For example, it includes a tool called 2to3 that assists in migrating Python 2.x code to Python 3.0. This article covers the major Python 3.0 language features, and future articles will cover:
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ython 3.0, a.k.a Python 3000, a.k.a Python 3K, is out. It aims to fix the language design problems accumulated over the Python 2.x's lifetime, and to clean up the language and its standard library. But this upgrade is a bitter pill for developers to swallow, because Python 3.0 is not backward compatible with Python 2.x. Python 3.0 even breaks the venerable "hello world!" program.
