[Python-checkins] r87112 - python/branches/py3k/Doc/whatsnew/3.2.rst
raymond.hettinger
python-checkins at python.org
Tue Dec 7 09:52:41 CET 2010
Author: raymond.hettinger
Date: Tue Dec 7 09:52:41 2010
New Revision: 87112
Log:
More cleanups and examples.
Modified:
python/branches/py3k/Doc/whatsnew/3.2.rst
Modified: python/branches/py3k/Doc/whatsnew/3.2.rst
==============================================================================
--- python/branches/py3k/Doc/whatsnew/3.2.rst (original)
+++ python/branches/py3k/Doc/whatsnew/3.2.rst Tue Dec 7 09:52:41 2010
@@ -483,13 +483,12 @@
(Added by Antoine Pitrou and Georg Brandl in :issue:`10093` and :issue:`477863`.)
-* :class:`range` objects now support *index* and *count* methods. This is
- part of an effort to make more objects fully implement the :class:`collections.Sequence`
- :term:`abstract base class`. As a result, the language will have a more
- uniform API.
-
- In addition, :class:`range` objects now support slicing and negative indices.
- This makes *range* more interoperable with lists.
+* :class:`range` objects now support *index* and *count* methods. This is part
+ of an effort to make more objects fully implement the
+ :class:`collections.Sequence` :term:`abstract base class`. As a result, the
+ language will have a more uniform API. In addition, :class:`range` objects
+ now support slicing and negative indices. This makes *range* more
+ interoperable with lists.
(Contributed by Daniel Stuzback in :issue:`9213` and by Alexander Belopolsky
in :issue:`2690`.)
@@ -558,10 +557,10 @@
(Contributed by Raymond Hettinger and incorporating design suggestions
from Mark Dickinson.)
-* The :mod:`nntplib` module gets a revamped implementation with better
- bytes / unicode semantics as well as more practical APIs. These improvements
- break compatibility with the nntplib version in Python 3.1, which was
- partly dysfunctional in itself.
+* The :mod:`nntplib` module gets a revamped implementation with better bytes and
+ unicode semantics as well as more practical APIs. These improvements break
+ compatibility with the nntplib version in Python 3.1, which was partly
+ dysfunctional in itself.
(Contributed by Antoine Pitrou in :issue:`9360`)
@@ -610,21 +609,35 @@
.. mention os.popen and subprocess.Popen auto-closing of fds
-* :class:`gzip.GzipFile` now implements the :class:`io.BufferedIOBase` ABC
- (except for ``truncate()``), has a :meth:`~gzip.GzipFile.peek` method,
- and supports unseekable as well as zero-padded file objects.
-
- (Contributed by Antoine Pitrou, Nir Aides and Brian Curtin in :issue:`9962`,
- :issue:`1675951`, :issue:`7471` and :issue:`2846`.)
+* :class:`gzip.GzipFile` now implements the :class:`io.BufferedIOBase`
+ :term:`abstract base class` (except for ``truncate()``). It also has a
+ :meth:`~gzip.GzipFile.peek` method and supports unseekable as well as
+ zero-padded file objects.
The :mod:`gzip` module also gains the :func:`~gzip.compress` and
:func:`~gzip.decompress` functions for easier in-memory compression and
decompression.
- (Contributed by Anand B. Pillai in :issue:`3488`.)
+ Keep in mind that text needs to be encoded in to bytes before compressing
+ and decompressing:
+
+ >>> s = 'Three shall be the number thou shalt count, '
+ >>> s += 'and the number of the counting shall be three'
+ >>> b = s.encode() # convert to utf-8
+ >>> len(b)
+ 89
+ >>> c = gzip.compress(b)
+ >>> len(c)
+ 77
+ >>> gzip.decompress(c).decode()[:43] # decompress and convert to text
+ 'Three shall be the number thou shalt count, '
+
+ (Contributed by Anand B. Pillai in :issue:`3488`; and by Antoine Pitrou, Nir
+ Aides and Brian Curtin in :issue:`9962`, :issue:`1675951`, :issue:`7471` and
+ :issue:`2846`.)
* The :mod:`os` module now has the :const:`ST_RDONLY` and :const:`ST_NOSUID`
- constants, for use with the :func:`~os.statvfs` function.
+ constants for use with the :func:`~os.statvfs` function.
(Patch by Adam Jackson; :issue:`7647`.)
@@ -707,8 +720,16 @@
as recommended in public uses of HTTPS.
(Added by Antoine Pitrou, :issue:`9003`.)
-* The command call, ``python -m unittest`` can now accept file paths instead
- of module names for running specific tests (:issue:`10620`).
+* The command-line call, ``python -m unittest`` can now accept file paths
+ instead of module names for running specific tests (:issue:`10620`). The new
+ test discovery can find tests within packages, locating any test importable
+ from the top level directory. The top level directory can be specified with
+ the `-t` option, a pattern for matching files with ``-p``, and a directory to
+ start discovery with ``-s``::
+
+ $ python -m unittest discover -s my_proj_dir -p '_test.py'
+
+ (Contributed by Michael Foord.)
* The :mod:`unittest` module has two new methods,
:meth:`~unittest.TestCase.assertWarns` and
@@ -718,9 +739,24 @@
>>> with self.assertWarns(DeprecationWarning):
... legacy_function('XYZ')
- In addition, the naming in the module has ungone a number of clean-ups.
- For example, :meth:`assertRegex` is the new name for :meth:`assertRegexpMatches`
- which was misnamed because the test uses :func:`re.search`, not :func:`re.match`.
+ Another new method, :meth:`~unittest.TestCase.assertCountEqual` is used to compare two iterables
+ to determine if their element counts are equal (are the same elements present
+ the same number of times::
+
+ def test_anagram(self):
+ self.assertCountEqual('algorithm', 'logarithm')
+
+ A principal feature of the unittest module is an effort to produce meaningful
+ diagnostics when a test fails. When possible the failure is recorded along
+ with a diff of the output. This is especially helpful for analyzing log files
+ of failed test runs. However, since diffs can sometime be voluminous, there is
+ a new :attr:`~unittest.TestCase.maxDiff` attribute which sets maximum length of
+ diffs.
+
+ In addition the naming in the module has ungone a number of clean-ups. For
+ example, :meth:`~unittest.TestCase.assertRegex` is the new name for
+ :meth:`~unittest.TestCase.assertRegexpMatches` which was misnamed because the
+ test uses :func:`re.search`, not :func:`re.match`.
To improve consistency, some of long-standing method aliases are being
deprecated in favor of the preferred names:
@@ -771,7 +807,10 @@
* The :mod:`tempfile` module has a new context manager,
:class:`~tempfile.TemporaryDirectory` which provides easy deterministic
- cleanup of temporary directories.
+ cleanup of temporary directories:
+
+ >>> with tempfile.TemporaryDirectory() as tmpdirname:
+ ... print 'created temporary directory', tmpdirname
(Contributed by Neil Schemenauer and Nick Coghlan; :issue:`5178`.)
@@ -807,14 +846,6 @@
(Contributed by Ron Adam; :issue:`2001`.)
-.. XXX add something about pdb additions:
-
- * new commands interact, (un)display, longlist, source, until lineno
- * -c option that executes commands as if given in .pdbrc
- * SIGINT handler to break a continued program
-
-.. XXX add optimize flags for py_compile/compileall (issue10553)
-
* The new :mod:`sysconfig` module makes it straight-forward to discover
installation paths and configuration variables which vary across platforms and
installs.
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