x re.search ('The.Spain', txt) Try it Yourself ». Search the string to see if it starts with 'The' and ends with 'Spain': import re. This document may be printed freely as long as this notice stays intact. When you have imported the re module, you can start using regular expressions: Example. ![]() ![]() The space can be replaced with the \s token, if tabs and other whitespace is desired there. Notice I removed the \s token, since you usually want only a (space). The space or whitespace can be also expressed in regex. In addition, a whitespace special character s will match any of the specific. 1 Answer Sorted by: 18 The difference is that specifically matches a space, while \s will match any whitespace character ( \r,, \t, \f and \v ). Different characters are expressed with different regex signs. : ? ^ _ ~Īny character defined as a printable character except those defined as part of the space character classĬontinuous string of alphanumeric characters and underscores.Īny character not part of the character classes:, ,, ,, ,, Ĭopyright © 2008 Pete Freitag (), All Rights Reserved. Basically a positive look ahead will match the regex between the opening ( and closing ) without actually moving the position of the cursor that is matching the string. The most common forms of whitespace you will use with regular expressions are the space ( ), the tab ( t ), the new line ( n) and the carriage return ( r) (useful in Windows environments), and these special characters match each of their respective whitespaces. Here is the regex syntax reference: Share. Regex Character Classes Cheat Sheet Regular Expressions (Regex) Character Classes Cheat Sheet POSIX Character Classes for Regular Expressions
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