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Finished what I'm going to write about the standard library.
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Guido van Rossum
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1 changed files with 85 additions and 47 deletions
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@ -53,7 +53,7 @@
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when researching a change.
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This article explains the new features in Python 3.0, compared to 2.6.
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Python 3.0, also known as "Python 3000" or "Py3k", is the first ever
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Python 3.0, also known as "Python 3000" or "Py3K", is the first ever
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*intentionally incompatible* release. There are more changes than in
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a typical release, and more that are important for all Python users.
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Nevertheless, after digesting the changes, you'll find that Python
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@ -247,7 +247,6 @@ Overview Of Syntactic Changes
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=============================
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This section gives a brief overview of every *syntactic* change.
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Several of these are discussed at greater length later.
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Additions
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---------
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@ -426,49 +425,105 @@ consulted for longer descriptions.
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Library Changes
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===============
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Due to time constraints, this document does not exhaustively cover
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the very extensive changes to the library.
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Due to time constraints, this document does not exhaustively cover the
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very extensive changes to the standard library. :pep:`3108` is the
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reference for the major changes to the library. Here's a capsule
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review:
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XXX Brief overview of what's changed in the library.
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* Many old modules were removed. Some, like :mod:`gopherlib` (no
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longer used) and :mod:`md5` (replaced by :mod:`hashlib`), were
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already deprecated by :pep:`0004`. Others were removed as a result
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of the removal of support for various platforms such as Irix, BeOS
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and Mac OS 9 (see :pep:`0011`). Some modules were also selected for
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removal in Python 3.0 due to lack of use or because a better
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replacement exists. See :pep:`3108` for an exhaustive list.
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* :pep:`3108`: stdlib reorganization.
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* The :mod:`bsddb3` package was removed because its presence in the
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core standard library has proved over time to be a particular burden
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for the core developers due to testing instability and Berlekey DB's
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release schedule. However, the package is alive and well,
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externally maintained at http://www.jcea.es/programacion/pybsddb.htm.
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* Some modules were renamed because their old name flaunted
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:pep:`0008`, or for various other reasons:
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======================= =======================
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Old Name New Name
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======================= =======================
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_winreg winreg
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ConfigParser configparser
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copy_reg copyreg
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Queue queue
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SocketServer socketserver
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markupbase _markupbase
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repr reprlib
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test.test_support test.support
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======================= =======================
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* A common pattern in Python 2.x is to have one version of a module
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implemented in pure Python, with an optional accelerated version
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implemented as a C extension; for example, :mod:`pickle` and
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:mod:`cPickle`. This places the burden of importing the accelerated
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version and falling back on the pure Python version on each user of
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these modules. In Python 3.0, the accelerated versions are
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considered implementation details of the pure Python versions.
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Users should always import the standard version, which attempts to
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import the accelerated version and falls back to the pure Python
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version. The :mod:`pickle` module received this treatment. The
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:mod:`profile` module is on the list for 3.1. The :mod:`StringIO`
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module has been turned into a class in the :mod:`io` module.
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* Some related modules have been grouped into packages, and usually
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the submodule names have been simplified. The resulting new
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packages are:
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* :mod:`dbm` (:mod:`anydbm`, :mod:`dbhash`, :mod:`dbm`,
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:mod:`dumbdbm`, :mod:`gdbm`, :mod:`whichdb`).
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* :mod:`html` (:mod:`HTMLParser`, :mod:`htmlentitydefs`).
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* :mod:`http` (:mod:`httplib`, :mod:`BaseHTTPServer`,
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:mod:`CGIHTTPServer`, :mod:`SimpleHTTPServer`, :mod:`Cookie`,
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:mod:`cookielib`).
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* :mod:`tkinter` (all :mod:`Tkinter`-related modules except
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:mod:`turtle`). The target audience of :mod:`turtle` doesn't
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really care about :mod:`tkinter`. Also note that as of Python
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2.6, the functionality of :mod:`turtle` has been greatly enhanced.
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* :mod:`urllib` (:mod:`urllib`, :mod:`urllib`2, :mod:`urlparse`,
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:mod:`robotparse`).
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* :mod:`xmlrpc` (:mod:`xmlrpclib`, :mod:`DocXMLRPCServer`,
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:mod:`SimpleXMLRPCServer`).
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Some other library changes (not covered by :pep:`3108`):
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* Killed :mod:`sets`. Use the builtin :func:`set` function.
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* XXX macfs, new, reconvert, stringold, xmllib, pcre, pypcre, strop
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* XXX :pep:`4`
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* XXX lib-old: Para, addpack, cmp, cmpcache, codehack, dircmp, dump,
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find, fmt, grep, lockfile, newdir, ni, packmail, poly, rand,
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statcache, tb, tzparse, util, whatsound, whrandom, zmod
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* XXX Removed sys.exitfunc
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* XXX Removed sys.exc_clear
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* XXX Removed sys.exc_type, exc_value, exc_traceback. (sys.last_type
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* Cleanup of the :mod:`sys` module: removed :func:`sys.exitfunc`,
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:func:`sys.exc_clear`, :data:`sys.exc_type`, :data:`sys.exc_value`,
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:data:`sys.exc_traceback`. (Note that :data:`sys.last_type`
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etc. remain.)
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* XXX array.read, array.write
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* Cleanup of the :class:`array.array` type: the :meth:`read` and
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:meth:`write` methods are gone; use :meth:`fromfile` and
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:meth:`tofile` instead.
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* XXX operator.sequenceIncludes
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* Cleanup of the :mod:`operator` module: removed
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:func:`sequenceIncludes` and :func:`isCallable`.
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* XXX thread.acquire_lock and thread.release_lock
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* Cleanup of the :mod:`thread` module: :func:`acquire_lock` and
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:func:`release_lock` are gone; use :func:`acquire` and
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:func:`release` instead.
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* XXX UserXXX -> XXXMixin?
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* XXX removed random.jumpahead API
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* XXX cookie module revamps
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* XXX heapq revamp
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* Cleanup of the :mod:`random` module: removed the :func:`jumpahead` API.
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Strings And Bytes
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=================
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This section discusses the many changes in string
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This section discusses the many changes in string XXX
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* There is only one string type; its name is :class:`str` but its behavior and
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implementation are like :class:`unicode` in 2.x.
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@ -761,23 +816,6 @@ XXX Platform-specific changes go here.
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.. ======================================================================
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.. _30section-other:
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Other Changes And Fixes
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=======================
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As usual, there were a bunch of other improvements and bugfixes
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scattered throughout the source tree. A search through the change
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logs finds there were XXX patches applied and YYY bugs fixed between
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Python 2.6 and 3.0. Both figures are likely to be underestimates.
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XXX Some of the more notable changes are:
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* XXX Details go here.
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.. ======================================================================
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Porting To Python 3.0
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=====================
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