Screenshot and download from http://tungwaiyip.info/software/pyregex.html.
Wai Yip Tung
------------------------------------------------------------------------
Usage: pyregex.py [options] "-"|filename regex [replacement [count]]
Test Python regular expressions. Specify test data's filename or use "-"
to enter test text from console. Optionally specify a replacement text.
Options:
-f filter mode
-n nnn limit to examine the first nnn lines. default no limit.
-m show only matched line. default False
Regular _expression_ Syntax
Special Characters
------------------------------------------------------------------------
. matches any character except a newline
^ matches the start of the string
$ matches the end of the string or just before the newline at the end of
the string
* matches 0 or more repetitions of the preceding RE
+ matches 1 or more repetitions of the preceding RE
? matches 0 or 1 repetitions of the preceding RE
{m} exactly m copies of the previous RE should be matched
{m,n} matches from m to n repetitions of the preceding RE
\ either escapes special characters or signals a special sequence
[] indicate a set of characters. Characters can be listed individually,
or a range of characters can be indicated by giving two characters and
separating them by a "-". Special characters are not active inside sets
Including a "^" as the first character match the complement of the set
| A|B matches either A or B
(...) indicates the start and end of a group
(?...) this is an extension notation. See documentation for detail
(?iLmsux) I ignorecase; L locale; M multiline; S dotall; U unicode; X verbose
*, +, ? and {m,n} are greedy. Append the ? qualifier to match non-greedily.
Special Sequences
------------------------------------------------------------------------
\number matches the contents of the group of the same number. Groups are
numbered starting from 1
\A matches only at the start of the string
\b matches the empty string at the beginning or end of a word
\B matches the empty string not at the beginning or end of a word
\d matches any decimal digit
\D matches any non-digit character
\g<name>use the substring matched by the group named 'name' for sub()
\s matches any whitespace character
\S matches any non-whitespace character
\w matches any alphanumeric character and the underscore
\W matches any non-alphanumeric character
\Z matches only at the end of the string
See the Python documentation on Regular _expression_ Syntax for more detail
http://docs.python.org/lib/re-syntax.html
-- http://mail.python.org/mailman/listinfo/python-announce-list
Support the Python Software Foundation:
http://www.python.org/psf/donations.html
