[Python-checkins] r87351 - python/branches/py3k/Doc/whatsnew/3.2.rst
lukasz.langa
python-checkins at python.org
Fri Dec 17 22:57:33 CET 2010
Author: lukasz.langa
Date: Fri Dec 17 22:57:32 2010
New Revision: 87351
Log:
configparser hype coming up!
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 Fri Dec 17 22:57:32 2010
@@ -1220,33 +1220,20 @@
Paths:
data = "C:\Python32"
- include = "C:\Python32\Include"
- platinclude = "C:\Python32\Include"
- platlib = "C:\Python32\Lib\site-packages"
- platstdlib = "C:\Python32\Lib"
- purelib = "C:\Python32\Lib\site-packages"
- scripts = "C:\Python32\Scripts"
- stdlib = "C:\Python32\Lib"
+ include = "C:\Python32\Include" platinclude = "C:\Python32\Include"
+ platlib = "C:\Python32\Lib\site-packages" platstdlib
+ = "C:\Python32\Lib" purelib = "C:\Python32\Lib\site-packages" scripts
+ = "C:\Python32\Scripts" stdlib = "C:\Python32\Lib"
Variables:
BINDIR = "C:\Python32"
- BINLIBDEST = "C:\Python32\Lib"
- EXE = ".exe"
- INCLUDEPY = "C:\Python32\Include"
- LIBDEST = "C:\Python32\Lib"
- SO = ".pyd"
- VERSION = "32"
- abiflags = ""
- base = "C:\Python32"
- exec_prefix = "C:\Python32"
- platbase = "C:\Python32"
- prefix = "C:\Python32"
- projectbase = "C:\Python32"
- py_version = "3.2"
- py_version_nodot = "32"
- py_version_short = "3.2"
- srcdir = "C:\Python32"
- userbase = "C:\Documents and Settings\Raymond\Application Data\Python"
+ BINLIBDEST = "C:\Python32\Lib" EXE = ".exe" INCLUDEPY
+ = "C:\Python32\Include" LIBDEST = "C:\Python32\Lib" SO = ".pyd"
+ VERSION = "32" abiflags = "" base = "C:\Python32" exec_prefix
+ = "C:\Python32" platbase = "C:\Python32" prefix = "C:\Python32"
+ projectbase = "C:\Python32" py_version = "3.2" py_version_nodot = "32"
+ py_version_short = "3.2" srcdir = "C:\Python32" userbase
+ = "C:\Documents and Settings\Raymond\Application Data\Python"
pdb
---
@@ -1266,8 +1253,83 @@
the global and local names found in the current scope.
* breakpoints can be cleared by breakpoint number
+configparser
+------------
+
+The :mod:`configparser` module was modified to improve usability and
+predictability of the default parser and its supported INI syntax. The old
+:class:`ConfigParser` class was removed in favor of :class:`SafeConfigParser`
+which has in turn been renamed to :class:`ConfigParser`. Support for inline
+comments is now turned off by default and section or option duplicates are not
+allowed in a single configuration source.
+
+Config parsers gained a new API based on the mapping protocol::
+
+ >>> parser = ConfigParser()
+ >>> parser.read_string("""
+ ... [DEFAULT]
+ ... monty = python
+ ...
+ ... [phrases]
+ ... the = who
+ ... full = metal jacket
+ ... """)
+ >>> parser['phrases']['full']
+ 'metal jacket'
+ >>> section = parser['phrases']
+ >>> section['the']
+ 'who'
+ >>> section['british'] = '%(the)s %(full)s %(monty)s!'
+ >>> parser['phrases']['british']
+ 'who metal jacket python!'
+ >>> 'british' in section
+ True
+
+The new API is implemented on top of the classical API e.g. custom parser
+subclasses should be able to use it without modifications.
+
+The INI file structure accepted by config parsers can now be customized. Users
+are able to specify alternative option/value delimiters and comment prefixes,
+change the name of the DEFAULT section or switch the interpolation syntax.
+Along with support for pluggable interpolation, an additional buildout-like
+interpolation handler (ExtendedInterpolation) was introduced::
+
+ >>> parser = ConfigParser(interpolation=ExtendedInterpolation())
+ >>> parser.read_dict({'buildout': {'directory': '/home/ambv/zope9'},
+ ... 'custom': {'prefix': '/usr/local'}})
+ >>> parser.read_string("""
+ ... [buildout]
+ ... parts =
+ ... zope9
+ ... instance
+ ... find-links =
+ ... ${buildout:directory}/downloads/dist
+ ...
+ ... [zope9]
+ ... recipe = plone.recipe.zope9install
+ ... location = /opt/zope
+ ...
+ ... [instance]
+ ... recipe = plone.recipe.zope9instance
+ ... zope9-location = ${zope9:location}
+ ... zope-conf = ${custom:prefix}/etc/zope.conf
+ ... """)
+ >>> parser['buildout']['find-links']
+ '\n/home/ambv/zope9/downloads/dist'
+ >>> parser['instance']['zope-conf']
+ '/usr/local/etc/zope.conf'
+ >>> instance = parser['instance']
+ >>> instance['zope-conf']
+ '/usr/local/etc/zope.conf'
+ >>> instance['zope9-location']
+ '/opt/zope'
+
+A number of smaller features were also introduced, like support for specifying
+encoding in read operations, specifying fallback values in getters, or reading
+directly from dictionaries and strings.
+
+(All changes contributed by Łukasz Langa.)
-.. XXX: Various ConfigParser changes
.. XXX: Mention urllib.parse changes
Issue 9873 (Nick Coghlan):
- ASCII byte sequence support in URL parsing
@@ -1541,6 +1603,34 @@
This section lists previously described changes and other bugfixes that may
require changes to your code:
+* The :mod:`configparser` class :class:`SafeConfigParser` has been updated and
+ renamed to :class:`ConfigParser` whereas the old :class:`ConfigParser` class
+ has been removed. This means a couple of minor incompatibilities:
+
+ * interpolation syntax is now validated on :meth:`get` and :meth:`set`
+ operations. In the default interpolation scheme, only two tokens with
+ percent signs are valid: %(name)s and %%, the latter being an escaped
+ percent sign. If that is not welcome, consider using
+ :class:`ExtendedInterpolation` or none at all.
+
+ * :meth:`set` and :meth:`add_section` now check whether the given value type
+ is a string. :mod:`configparser` was never designed to hold non-string
+ values internally.
+
+ * exception is raised on any section or option duplicates that appear when
+ reading a single source. This exposes mistakes in user configuration.
+
+ * inline comments are now disabled by default which means the ``;`` character
+ can be safeuly used in values (``#`` was never allowed as inline comment).
+
+ * comments now can be indented which means for ``;`` and ``#`` to appear at
+ the start of a line in multiline values, it has to be interpolated. This is
+ preferable because in INI files a character that is also a comment prefix
+ cannot be taken for a comment by mistake.
+
+ * ``""`` is now a valid value, no longer automatically converted to an empty
+ string. For empty strings users can use ``"option ="`` in a line.
+
* The :mod:`nntplib` module was reworked extensively, meaning that its APIs
are often incompatible with the 3.1 APIs.
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