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PEP 4: convert to reST, update SourceForge -> bugs.python.org, update DeprecationWarning policy 

and add removal of code using the module.

Closes #8090.
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Georg Brandl 2013-10-12 18:11:53 +02:00
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@ -5,90 +5,99 @@ Last-Modified: $Date$
Author: Martin von Löwis <martin@v.loewis.de>
Status: Active
Type: Process
Content-Type: text/x-rst
Created: 1-Oct-2000
Post-History:
Introduction
============
When new modules were added to the standard Python library in the
past, it was not possible to foresee whether they would still be
useful in the future. Even though Python "Comes With Batteries
Included", batteries may discharge over time. Carrying old
modules around is a burden on the maintainer, especially when
there is no interest in the module anymore.
When new modules were added to the standard Python library in the
past, it was not possible to foresee whether they would still be
useful in the future. Even though Python "Comes With Batteries
Included", batteries may discharge over time. Carrying old modules
around is a burden on the maintainer, especially when there is no
interest in the module anymore.
At the same time, removing a module from the distribution is
difficult, as it is not known in general whether anybody is still
using it. This PEP defines a procedure for removing modules from
the standard Python library. Usage of a module may be
`deprecated', which means that it may be removed from a future
Python release. The rationale for deprecating a module is also
collected in this PEP. If the rationale turns out faulty, the
module may become `undeprecated'.
At the same time, removing a module from the distribution is
difficult, as it is not known in general whether anybody is still
using it. This PEP defines a procedure for removing modules from the
standard Python library. Usage of a module may be 'deprecated', which
means that it may be removed from a future Python release. The
rationale for deprecating a module is also collected in this PEP. If
the rationale turns out faulty, the module may become 'undeprecated'.
Procedure for declaring a module deprecated
===========================================
Since the status of module deprecation is recorded in this PEP,
proposals for deprecating modules MUST be made by providing a
change to the text of this PEP, which SHOULD be a patch posted to
SourceForge, or sent by mail to the author of this PEP.
Since the status of module deprecation is recorded in this PEP,
proposals for deprecating modules MUST be made by providing a change
to the text of this PEP, which SHOULD be a patch posted to
bugs.python.org.
A proposal for deprecation of the module MUST include the date of
the proposed deprecation and a rationale for deprecating it. In
addition, the proposal MUST include a change to the documentation
of the module; deprecation is indicated by saying that the module
is "obsolete" or "deprecated". The proposal MAY include a patch
for the module's source code to indicate deprecation there as
well.
A proposal for deprecation of the module MUST include the date of the
proposed deprecation and a rationale for deprecating it. In addition,
the proposal MUST include a change to the documentation of the module;
deprecation is indicated by saying that the module is "obsolete" or
"deprecated". The proposal SHOULD include a patch for the module's
source code to indicate deprecation there as well, by raising a
DeprecationWarning. The proposal MUST include patches to remove any
use of the deprecated module from the standard library.
It is expected that deprecated modules are included in the Python
releases that immediately follows the deprecation; later releases
may ship without the deprecated modules.
It is expected that deprecated modules are included in the Python
releases that immediately follows the deprecation; later releases may
ship without the deprecated modules.
Procedure for declaring a module undeprecated
=============================================
When a module becomes deprecated, a rationale is given for its
deprecation. In some cases, an alternative interface for the same
functionality is provided, so the old interface is deprecated. In
other cases, the need for having the functionality of the module
may not exist anymore.
When a module becomes deprecated, a rationale is given for its
deprecation. In some cases, an alternative interface for the same
functionality is provided, so the old interface is deprecated. In
other cases, the need for having the functionality of the module may
not exist anymore.
If the rationale is faulty, again a change to this PEP's text MUST
be submitted. This change MUST include the date of undeprecation
and a rationale for undeprecation. Modules that are undeprecated
under this procedure MUST be listed in this PEP for at least one
major release of Python.
If the rationale is faulty, again a change to this PEP's text MUST be
submitted. This change MUST include the date of undeprecation and a
rationale for undeprecation. Modules that are undeprecated under this
procedure MUST be listed in this PEP for at least one major release of
Python.
Obsolete modules
================
A number of modules are already listed as obsolete in the library
documentation. These are listed here for completeness.
A number of modules are already listed as obsolete in the library
documentation. These are listed here for completeness.
cl, sv, timing
cl, sv, timing
All these modules have been declared as obsolete in Python 2.0,
some even earlier.
All these modules have been declared as obsolete in Python 2.0, some
even earlier.
The following obsolete modules were removed in Python 2.5:
The following obsolete modules were removed in Python 2.5:
addpack, cmp, cmpcache, codehack, dircmp, dump, find, fmt,
grep, lockfile, newdir, ni, packmail, Para, poly,
rand, reconvert, regex, regsub, statcache, tb, tzparse,
util, whatsound, whrandom, zmod
addpack, cmp, cmpcache, codehack, dircmp, dump, find, fmt,
grep, lockfile, newdir, ni, packmail, Para, poly,
rand, reconvert, regex, regsub, statcache, tb, tzparse,
util, whatsound, whrandom, zmod
The following modules were removed in Python 2.6:
The following modules were removed in Python 2.6:
gopherlib, rgbimg, macfs
gopherlib, rgbimg, macfs
The following modules currently lack a DeprecationWarning:
The following modules currently lack a DeprecationWarning:
rfc822, mimetools, multifile
rfc822, mimetools, multifile
Deprecated modules
==================
::
Module name: posixfile
Rationale: Locking is better done by fcntl.lockf().
@ -251,19 +260,31 @@ Deprecated modules
Deprecation of modules removed in Python 3.0
============================================
PEP 3108 lists all modules that have been removed from Python 3.0.
They all are documented as deprecated in Python 2.6, and raise a
DeprecationWarning if the -3 flag is activated.
PEP 3108 lists all modules that have been removed from Python 3.0.
They all are documented as deprecated in Python 2.6, and raise a
DeprecationWarning if the -3 flag is activated.
Undeprecated modules
====================
None.
None.
Copyright
=========
This document has been placed in the public domain.
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