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authorAndrew M. Kuchling <amk@amk.ca>2010-05-07 01:45:14 (GMT)
committerAndrew M. Kuchling <amk@amk.ca>2010-05-07 01:45:14 (GMT)
commit02f7b990e1a4add0b2ce4db5217cc618ef90ddcf (patch)
treea9e47ec9b4e0e40256a3f7c6318203a6ad3d5b1f /Doc/whatsnew
parent328e3775df24c418b921c140c78e4e964f85b09d (diff)
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Add a new section on the development plan; add an item
Diffstat (limited to 'Doc/whatsnew')
-rw-r--r--Doc/whatsnew/2.7.rst79
1 files changed, 64 insertions, 15 deletions
diff --git a/Doc/whatsnew/2.7.rst b/Doc/whatsnew/2.7.rst
index 616191c..b3d7760 100644
--- a/Doc/whatsnew/2.7.rst
+++ b/Doc/whatsnew/2.7.rst
@@ -8,9 +8,7 @@
.. Fix accents on Kristjan Valur Jonsson, Fuerstenau
-.. Big jobs: pep 391
-.. Initial section: development plans for 2.x in future
-.. Initial section: changes in deprecation warning behaviour
+.. Big jobs: pep 391, PyCapsule
.. hyperlink all the methods & functions.
@@ -62,17 +60,42 @@ This article explains the new features in Python 2.7. The final
release of 2.7 is currently scheduled for July 2010; the detailed
schedule is described in :pep:`373`.
-Python 2.7 is planned to be the last major release in the 2.x series.
-Though more major releases have not been absolutely ruled out, the
-Python maintainers are planning to focus more on Python 3.x. Despite
-that, it's likely that the 2.7 release will have a longer period of
-maintenance compared to earlier 2.x versions.
-
.. Compare with previous release in 2 - 3 sentences here.
add hyperlink when the documentation becomes available online.
.. _whatsnew27-python31:
+The Future for Python 2.x
+=========================
+
+Python 2.7 is intended to be the last major release in the 2.x series.
+Though more major releases have not been absolutely ruled out, the
+Python maintainers are planning to focus their efforts on Python 3.x.
+
+This means that 2.7 will remain in place for a long time, running
+production systems that have not been ported to Python 3.x.
+Two consequences of the long-term significance of 2.7 are:
+
+* It's very likely the 2.7 release will have a longer period of
+ maintenance compared to earlier 2.x versions. Python 2.7 will
+ continue to be maintained while the transition to 3.x is in
+ progress, and that transition will itself be lengthy. Most 2.x
+ versions are maintained for about 4 years, from the first to the
+ last bugfix release; patchlevel releases for Python 2.7 will
+ probably be made for at least 6 years.
+
+* Because 2.7 will be running production applications, a policy
+ decision was made to silence warnings only of interest to developers
+ by default. Silencing :exc:`DeprecationWarning` and its descendants
+ prevents users from seeing warnings triggered by an application.
+ (Carried out in :issue:`7319`.)
+
+ You can re-enable display of :exc:`DeprecationWarning` messages by
+ running Python with the :option:`-Wdefault` (short form:
+ :option:`-Wd`) switch, or you can add
+ ``warnings.simplefilter('default')`` to your code.
+
+
Python 3.1 Features
=======================
@@ -181,11 +204,6 @@ A secondary dictionary maps keys to their corresponding list node, so
deletion doesn't have to traverse the entire linked list and therefore
remains O(1).
-.. XXX check O(1)-ness with Raymond
-.. Also check if the 'somenamedtuple' in the collection module should
-.. be replaced/removed in order to use
-.. :meth:`~collections.namedtuple._asdict()` (see below)
-
The standard library now supports use of ordered dictionaries in several
modules.
@@ -364,10 +382,17 @@ if one is installed.
XXX describe an example.
-Two smaller enhancements to the logging module are:
+Three smaller enhancements to the :mod:`logging` module, all
+implemented by Vinay Sajip, are:
.. rev79293
+* The :class:`~logging.handlers.SysLogHandler` class now supports
+ syslogging over TCP. The constructor has a *socktype* parameter
+ giving the type of socket to use, either :const:`socket.SOCK_DGRAM`
+ for UDP or :const:`socket.SOCK_STREAM` for TCP. The default
+ protocol remains UDP.
+
* :class:`Logger` instances gained a :meth:`getChild` method that retrieves a
descendant logger using a relative path. For example,
once you retrieve a logger by doing ``log = getLogger('app')``,
@@ -950,6 +975,30 @@ changes, or look through the Subversion logs for all the details.
length as the read-only :attr:`~collections.deque.maxlen` attribute.
(Both features added by Raymond Hettinger.)
+* Constructors for the parsing classes in the :mod:`ConfigParser` module now
+ take a *allow_no_value* parameter, defaulting to false; if true,
+ options without values will be allowed. For example::
+
+ >>> import ConfigParser, StringIO
+ >>> sample_config = """
+ ... [mysqld]
+ ... user = mysql
+ ... pid-file = /var/run/mysqld/mysqld.pid
+ ... skip-bdb
+ ... """
+ >>> config = ConfigParser.RawConfigParser(allow_no_value=True)
+ >>> config.readfp(StringIO.StringIO(sample_config))
+ >>> config.get('mysqld', 'user')
+ 'mysql'
+ >>> print config.get('mysqld', 'skip-bdb')
+ None
+ >>> print config.get('mysqld', 'unknown')
+ Traceback (most recent call last):
+ ...
+ ConfigParser.NoOptionError: No option 'unknown' in section: 'mysqld'
+
+ (Contributed by Mats Kindahl; :issue:`7005`.)
+
* Deprecated function: :func:`contextlib.nested`, which allows
handling more than one context manager with a single :keyword:`with`
statement, has been deprecated, because :keyword:`with` supports