119 lines
3.1 KiB
Plaintext
119 lines
3.1 KiB
Plaintext
PEP: 3099
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Title: Things that will Not Change in Python 3000
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Version: $Revision$
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Last-Modified: $Date$
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Author: Georg Brandl <g.brandl@gmx.net>
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Status: Draft
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Type: Informational
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Content-Type: text/x-rst
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Created: 04-Apr-2006
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Abstract
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========
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This PEP tries to list all BDFL pronouncements on Python 3000 that
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refer to changes that will not happen and new features that will not
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be introduced, sorted by topics, along with a short explanation or a
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reference to the relevant thread on the python-3000 mailing list.
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Core language
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=============
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* ``lambda`` will not be renamed.
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Thread: "genexp syntax / lambda",
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http://mail.python.org/pipermail/python-3000/2006-April/001042.html
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* Python will not have programmable syntax.
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Thread: "It's a statement! It's a function! It's BOTH!",
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http://mail.python.org/pipermail/python-3000/2006-April/000286.html
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* There won't be a syntax for ``zip()``-style parallel iteration.
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Thread: "Parallel iteration syntax",
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http://mail.python.org/pipermail/python-3000/2006-March/000210.html
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* Strings will stay iterable.
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Thread: "Making strings non-iterable",
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http://mail.python.org/pipermail/python-3000/2006-April/000759.html
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* There will be no syntax to sort the result of a generator expression
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or list comprehension. ``sorted()`` covers all use cases.
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Thread: "Adding sorting to generator comprehension",
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http://mail.python.org/pipermail/python-3000/2006-April/001295.html
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* Python 3000 source code won't use non-ASCII Unicode characters for
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anything except string literals or comments.
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Thread: sets in P3K?
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http://mail.python.org/pipermail/python-3000/2006-April/01474.html
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* Slices and extended slices won't go away (even if the __getslice__
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and __setslice__ APIs may be replaced) nor will they return views
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for the standard object types.
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Thread: Future of slices
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http://mail.python.org/pipermail/python-3000/2006-May/001563.html
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* It will not be forbidden to reuse a loop variable inside the loop's
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suite.
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Thread: elimination of scope bleeding of iteration variables
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http://mail.python.org/pipermail/python-dev/2006-May/064761.html
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Builtins
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========
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* ``hash()`` won't become an attribute since attributes should be cheap
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to compute, which isn't necessarily the case for a hash.
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Thread: "hash as attribute/property",
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http://mail.python.org/pipermail/python-3000/2006-April/000362.html
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Standard types
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==============
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* Iterating over a dictionary will continue to yield the keys.
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Thread: "Iterating over a dict",
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http://mail.python.org/pipermail/python-3000/2006-April/000283.html
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* There will be no ``frozenlist`` type.
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Thread: "Immutable lists",
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http://mail.python.org/pipermail/python-3000/2006-May/002219.html
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Coding style
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============
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* The (recommended) maximum line width will remain 80 characters,
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for both C and Python code.
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Thread: "C style guide",
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http://mail.python.org/pipermail/python-3000/2006-March/000131.html
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Copyright
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=========
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This document has been placed in the public domain.
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..
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coding: utf-8
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End:
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