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Name: hachoir-regex
Version: 1.0.5
Summary: Manipulation of regular expressions (regex)
Home-page: http://bitbucket.org/haypo/hachoir/wiki/hachoir-regex
Author: Victor Stinner
Author-email: UNKNOWN
License: GNU GPL v2
Download-URL: http://bitbucket.org/haypo/hachoir/wiki/hachoir-regex
Description: Hachoir regex
=============
hachoir-regex is a Python library for regular expression (regex or regexp)
manupulation. You can use a|b (or) and a+b (and) operators. Expressions are
optimized during the construction: merge ranges, simplify repetitions, etc.
It also contains a class for pattern matching allowing to search multiple
strings and regex at the same time.
Website: http://bitbucket.org/haypo/hachoir/wiki/hachoir-regex
Changelog
=========
Version 1.0.5 (2010-01-28)
* Create a MANIFEST.in to include extra files: regex.rst, test_doc.py, etc.
* Create an INSTALL file
Version 1.0.4 (2010-01-13)
* Support \b (match a word)
* Fix parser: support backslash in a range, eg. parse(r"[a\]x]")
Version 1.0.3 (2008-04-01)
* Raise SyntaxError on unsupported escape character
* Two dot atoms are always equals
Version 1.0.2 (2007-07-12)
* Refix PatternMatching without any pattern
Version 1.0.1 (2007-06-28)
* Fix PatternMatching without any pattern
Version 1.0 (2007-06-28)
* First public version
Regex examples
==============
Regex are optimized during their creation:
>>> from hachoir_regex import parse, createRange, createString
>>> createString("bike") + createString("motor")
<RegexString 'bikemotor'>
>>> parse('(foo|fooo|foot|football)')
<RegexAnd 'foo(|[ot]|tball)'>
Create character range:
>>> regex = createString("1") | createString("3")
>>> regex
<RegexRange '[13]'>
>>> regex |= createRange("2", "4")
>>> regex
<RegexRange '[1-4]'>
As you can see, you can use classic "a|b" (or) and "a+b" (and)
Python operators. Example of regular expressions using repetition:
>>> parse("(a{2,}){3,4}")
<RegexRepeat 'a{6,}'>
>>> parse("(a*|b)*")
<RegexRepeat '[ab]*'>
>>> parse("(a*|b|){4,5}")
<RegexRepeat '(a+|b){0,5}'>
Compute minimum/maximum matched pattern:
>>> r=parse('(cat|horse)')
>>> r.minLength(), r.maxLength()
(3, 5)
>>> r=parse('(a{2,}|b+)')
>>> r.minLength(), r.maxLength()
(1, None)
Pattern maching
===============
Use PatternMaching if you would like to find many strings or regex in a string.
Use addString() and addRegex() to add your patterns.
>>> from hachoir_regex import PatternMatching
>>> p = PatternMatching()
>>> p.addString("a")
>>> p.addString("b")
>>> p.addRegex("[cd]")
And then use search() to find all patterns:
>>> for start, end, item in p.search("a b c d"):
... print "%s..%s: %s" % (start, end, item)
...
0..1: a
2..3: b
4..5: [cd]
6..7: [cd]
You can also attach an objet to a pattern with 'user' (user data) argument:
>>> p = PatternMatching()
>>> p.addString("un", 1)
>>> p.addString("deux", 2)
>>> for start, end, item in p.search("un deux"):
... print "%r at %s: user=%r" % (item, start, item.user)
...
<StringPattern 'un'> at 0: user=1
<StringPattern 'deux'> at 3: user=2
Installation
============
With distutils:
sudo ./setup.py install
Or using setuptools:
sudo ./setup.py --setuptools install
Platform: UNKNOWN
Classifier: Development Status :: 5 - Production/Stable
Classifier: Intended Audience :: Developers
Classifier: Intended Audience :: Education
Classifier: License :: OSI Approved :: GNU General Public License (GPL)
Classifier: Natural Language :: English
Classifier: Operating System :: OS Independent
Classifier: Programming Language :: Python
Classifier: Topic :: Scientific/Engineering :: Information Analysis
Classifier: Topic :: Software Development :: Interpreters
Classifier: Topic :: Software Development :: Libraries :: Python Modules
Classifier: Topic :: Text Processing
Classifier: Topic :: Utilities
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