[Python-Dev] [Python-3000] RELEASED Python 3.0 final
Terry Reedy
tjreedy at udel.edu
Thu Dec 4 17:47:22 CET 2008
Guido van Rossum wrote:
>> Python 3.0 (a.k.a. "Python 3000" or "Py3k") represents a major milestone in
>> Python's history, and was nearly three years in the making. This is a new
>> version of the language that is incompatible with the 2.x line of releases,
I think this
>> while remaining true to BDFL Guido van Rossum's vision. Some things you
>> will notice include:
>>
>> * Fixes to many old language warts
>> * Removal of long deprecated features and redundant syntax
>> * Improvements in, and a reorganization of, the standard library
>> * Changes to the details of how built-in objects like strings and dicts work
>> * ...and many more new features
>>
>> While these changes were made without concern for backward compatibility,
and this could give some people a mis-impression, most likely negative,
as to the magnitude and nature of the change. Most of the code I am now
writing would, I believe, run with 2.5 except for print(..., file=xxx).
And I know that there was concern for backward compatibility to the
point that some changes were rejected (renaming builtins) or delayed
(deleting duplicate test asserts) for that reason. So I would soften
the statements to "... version of the language that is partially
incompatible with... " and "were made without being bound by backward
compatibility,"
tjr
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