Scott: /* Introduction */

2013-09-13T21:05:53Z

Introduction

← Older revision		Revision as of 21:05, 13 September 2013
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	== Introduction ==		== Introduction ==
	http://www.amk.ca/python/howto/regex/regex.html		http://www.amk.ca/python/howto/regex/regex.html

			http://www.tutorialspoint.com/python/python_reg_expressions.htm
			good tutorial

	== Reg Exp Syntax ==		== Reg Exp Syntax ==

Scott: Created page with '== Introduction == http://www.amk.ca/python/howto/regex/regex.html == Reg Exp Syntax == http://docs.python.org/lib/re-syntax.html * \d Matches any decimal digit; this is equival…'

2011-02-01T22:24:30Z

Created page with '== Introduction == http://www.amk.ca/python/howto/regex/regex.html == Reg Exp Syntax == http://docs.python.org/lib/re-syntax.html * \d Matches any decimal digit; this is equival…'

New page

== Introduction ==
http://www.amk.ca/python/howto/regex/regex.html

== Reg Exp Syntax ==
http://docs.python.org/lib/re-syntax.html
* \d Matches any decimal digit; this is equivalent to the class [0-9].
* \D Matches any non-digit character; this is equivalent to the class [^0-9].
* \s Matches any whitespace character; this is equivalent to the class [ \t\n\r\f\v].
* \S Matches any non-whitespace character; this is equivalent to the class [^ \t\n\r\f\v].
* \w Matches any alphanumeric character; this is equivalent to the class [a-zA-Z0-9_].
* \W Matches any non-alphanumeric character; this is equivalent to the class [^a-zA-Z0-9_].

== Compile for Performance ==
The sequence
<source lang="python">
prog = re.compile(pat)
result = prog.match(str)
</source>
is equivalent to
<source lang="python">
result = re.match(pat, str)
</source>
but the version using compile() is more efficient when the expression will be used several times in a single program.

== Examples ==
The sequence
<source lang="python">
import re

s = 'abcdef'
re.match(r'^abcdef$', s) # <_sre.SRE_Match object at 0x2b042001d238>
re.match(r'^abcdef$', s).group() # 'abcdef'
</source>

Python Regular Expressions - Revision history

Scott: /* Introduction */

Scott: Created page with '== Introduction == http://www.amk.ca/python/howto/regex/regex.html == Reg Exp Syntax == http://docs.python.org/lib/re-syntax.html * \d Matches any decimal digit; this is equival…'