Regular Expression : Bad Character Range

From	Frank Cui <ycui@outlook.com>
Subject	Regular Expression : Bad Character Range
Date	2013-12-19 23:50 -0300
Newsgroups	comp.lang.python
Message-ID	<mailman.4424.1387509722.18130.python-list@python.org> (permalink)

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Hey guys,

I'm trying to compile a regular Expression while encountering the following issue, any hints ?

is hyphen "-" or underscore "_" considered any meta character which is not allowed when putting into the range ?

Thanks
Frank

In [2]: re.compile("[\w-_]+>")
---------------------------------------------------------------------------
error                                     Traceback (most recent call last)
/home/frank/<ipython-input-2-ee4b44c4d17a> in <module>()
----> 1 re.compile("[\w-_]+>")

/usr/lib/python2.7/re.pyc in compile(pattern, flags)
    188 def compile(pattern, flags=0):
    189     "Compile a regular expression pattern, returning a pattern object."
--> 190     return _compile(pattern, flags)
    191 
    192 def purge():

/usr/lib/python2.7/re.pyc in _compile(*key)
    240         p = sre_compile.compile(pattern, flags)
    241     except error, v:
--> 242         raise error, v # invalid expression
    243     if len(_cache) >= _MAXCACHE:
    244         _cache.clear()

error: bad character range

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Regular Expression : Bad Character Range Frank Cui <ycui@outlook.com> - 2013-12-19 23:50 -0300

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