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authorRaymond Hettinger <python@rcn.com>2010-12-05 00:39:18 (GMT)
committerRaymond Hettinger <python@rcn.com>2010-12-05 00:39:18 (GMT)
commita5a3554b4d89e92175a165a487fa13a62560fe28 (patch)
tree22f30a3a9c6dc413bfe5838251d05eb4f532162b
parent6e35394ed5f01bd7b06a3366cadaeb8f765851ef (diff)
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Start the argparse entry.
-rw-r--r--Doc/whatsnew/3.2.rst37
1 files changed, 30 insertions, 7 deletions
diff --git a/Doc/whatsnew/3.2.rst b/Doc/whatsnew/3.2.rst
index 3c913a1..970948a 100644
--- a/Doc/whatsnew/3.2.rst
+++ b/Doc/whatsnew/3.2.rst
@@ -69,9 +69,30 @@ need to be recompiled for every feature release.
.. seealso::
- :pep:`384` - PYC Repository Directories
+ :pep:`384` - Define a Stable ABI
PEP written by Martin von Loewis.
+PEP 389: Argparse Command Line Parsing Module
+=============================================
+
+A new module for command line parsing, :mod:`argparse`, was introduced to
+overcome the limitations of :mod:`optparse` which did not provide support for
+positional arguments (not just option), subcommands, required options and other
+common patterns of specifying and validatig options.
+
+This module has already has wide-spread success in the community as a
+third-party module. Being more fully featured than its predecessor,
+:mod:`argparse`, is now the preferred module for command-line processing. The
+older module is still being kept available because of the substantial amount of
+legacy code that depends on it.
+
+.. XXX add examples that highlight the new features
+
+.. seealso::
+
+ :pep:`389` - New Command Line Parsing Module
+ PEP written by Steven Bethard.
+
PEP 391: Dictionary Based Configuration for Logging
====================================================
@@ -139,7 +160,7 @@ launching and managing calls. The goal of the executors is to make it easier to
use existing tools for making parallel calls. They save the effort needed to
setup a pool of resources, launch the calls, create a results queue, add
time-out handling, and limit the total number of threads, processes, or remote
-procedure calls.
+procedure calls. adfasdf
Ideally, each application should share a single executor across multiple
components so that process and thread limits can be centrally managed. This
@@ -154,14 +175,14 @@ see :ref:`code for computing prime numbers in parallel<processpoolexecutor-examp
.. seealso::
- :pep:`3148` - PYC Repository Directories
+ :pep:`3148` - Futures -- Execute Computations Asynchronously
PEP written by Brain Quinlan.
PEP 3147: PYC Repository Directories
=====================================
-Python's scheme for caching bytecode in *.pyc* files did not work well in
+Python's scheme for caching bytecode in *.pyc* files did not wosrk well in
environments with multiple python interpreters. If one interpreter encountered
a cached file created by another interpreter, it would recompile the source and
overwrite the cached file, thus losing the benefits of caching.
@@ -376,8 +397,6 @@ Some smaller changes made to the core Python language are:
New, Improved, and Deprecated Modules
=====================================
-* XXX mention :mod:`argparse`.
-
* The :mod:`functools` module includes a new decorator for caching function
calls. :func:`functools.lru_cache` can save repeated queries to an external
resource whenever the results are expected to be the same.
@@ -418,7 +437,7 @@ New, Improved, and Deprecated Modules
:issue:`8814`.)
* The :mod:`itertools` module has a new function, :func:`~itertools.accumulate`
- modeled on APL's *scan* and on Numpy's *accumulate* function:
+ modeled on APL's *scan* operator and on Numpy's *accumulate* function:
>>> list(accumulate(8, 2, 50))
[8, 10, 60]
@@ -443,6 +462,10 @@ New, Improved, and Deprecated Modules
* The :mod:`abc` module now supports :func:`~abc.abstractclassmethod` and
:func:`~abc.abstractstaticmethod`.
+ These tools make it possible to define an :term:`Abstract Base Class` that
+ requires a particular :func:`classmethod` or :func:`staticmethod` to be
+ implemented.
+
(Patch submitted by Daniel Urban; :issue:`5867`.)
* The previously deprecated :func:`contextlib.nested` function has been removed