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Regular Expression Pocket Reference, 2nd Edition
book

Regular Expression Pocket Reference, 2nd Edition

by Tony Stubblebine
July 2007
Intermediate to advanced content levelIntermediate to advanced
128 pages
2h 39m
English
O'Reilly Media, Inc.
Content preview from Regular Expression Pocket Reference, 2nd Edition

Supported Metacharacters

The re module supports the metacharacters and metasequences listed in Table 27 through Table 31. For expanded definitions of each metacharacter, see "Regex Metacharacters, Modes, and Constructs.”

Table 1-27. Python character representations

Sequence

Meaning

\a

Alert (bell), \x07.

\b

Backspace, \x08, supported only in character class.

\n

Newline, \x0A.

\r

Carriage return, \x0D.

\f

Form feed, \x0C.

\t

Horizontal tab, \x09.

\v

Vertical tab, \x0B.

\octal

Character specified by up to three octal digits.

\xhh

Character specified by a two-digit hexadecimal code.

\uhhhh

Character specified by a four-digit hexadecimal code.

\Uhhhhhhhh

Character specified by an eight-digit hexadecimal code.

Table 1-28. Python character classes and class-like constructs

Class

Meaning

[...]

Any character listed, or contained within a listed range.

[^...]

Any character that is not listed, and is not contained within a listed range.

.

Any character, except a newline (unless DOTALL mode).

\w

Word character, [a-zA-z0-9_] (unless LOCALE or UNICODE mode).

\W

Nonword character, [^a-zA-z0-9_] (unless LOCALE or UNICODE mode).

\d

Digit character, [0-9].

\D

Nondigit character, [^0-9].

\s

Whitespace character, [ \t\n\r\f\v].

\S

Nonwhitespace character, [ \t\n\r\f\v].

Table 1-29. Python anchors and zero-width tests

Sequence

Meaning

^

Start of string, or the point after any newline if in MULTILINE match mode.

\A

Start of search string, in all match modes.

$

End of search string, or the point before a string-ending newline, or before any newline in

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Publisher Resources

ISBN: 9780596514273Errata Page