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#Python regex cheat sheet full
#Python regex cheat sheet code

It is what the above two expressions will literally match. That said: The "match string" is the final product of either of the two above expressions. The image isn't meant to be explanatory, it is meant to be reference and refreshing material. Where it refers to python strings, and "regex strings" (which are actually Python "raw" strings) and something called "match strings". However, one part of the image is confusing.

#Python regex cheat sheet code

Exactement huit chiffres héxa doivent être fournis, même si le code point unicode le plus grand est \U0010ffff.

\Uhhhhhhhh Correspond à un caractère dont la valeur hexa est hhhhhhhh.

\uhhhh Correspond à un caractère dont la valeur hexa est hhhh.

The following feature does not seems to work in python:įor example, the ICU regular expression provides the following patterns: Regular Expression Starter - A simple guide for beginnersĭocumentation on using re with Unicode. Periodic table of PERL operators - for those who like visualization Redemo tool - ships with Python (C:\\Python24\Tools\Scripts\redemo.py), indispensible when trying out regular expressions ships with PythonCard as well Summary of Regular Expression Patterns - by DavidMertz RegexBuddy - Handy tool to create and test Python regular expressions Regular Expression HOWTO - excellent Python-based regular expression tutorial, by A.M. You should run the above commands on your Python version and specific hardware, and use patterns that represent your problem domain, for more representative results.Ĥ.2.1 Regular Expression Syntax - PythonLibraryReference The above numbers were produced on an Intel Core i7 3770k running Python 2.7.6 (circa 2014). Python -m timeit -s 'import re match_re = re.compile("(.*?)")' \ġ000000 loops, best of 3: 0.572 usec per loop The relative speed of compiled versus non-compiled patterns can be shown using the timeit module:ġ000000 loops, best of 3: 1.35 usec per loop The re.VERBOSE flag allows you to organize a pattern into logical sections visually and add comments.1 import re 2 match_re= re. ) matches all characters including a newline. ) matches any characters except a newline. The re.MULTILINE makes the ^ matches at the beginning of a string and at the beginning of each line and $ matches at the end of a string and at the end of each line.īy default, the dot (.

The re.LOCALE is not compatible with the re.ASCII flag. It makes the \w, \W, \b, \B and case-sensitive matching dependent on the current locale. The re.LOCALE is relevant only to the byte pattern. It means that the will also match lowercase letters. The re.DEBUG shows the debug information of compiled pattern.

#Python regex cheat sheet full

It makes the \w, \W, \b, \B, \d, \D, and \S perform ASCII-only matching instead of full Unicode matching. The re.ASCII is relevant to the byte patterns only.

Split a string at the occurrences of matches Return a string with matched replaced with a replacement Return the match at the beginning of a string or None Return a Match object if the whole string matches a pattern Return an iterator yielding all non-overlapping matches The following table shows the regex function from the re module. Match X but only if it is NOT followed by Y Reference the capturing group #N (alternative syntax) Match any single element except X, Y, and Z

Match its preceding element from n to m times Match its preceding element at least n times. Match its preceding element exactly n times. Match its preceding element zero or one time. Match its preceding element one or more times. Match its preceding element zero or more times. Match a position that is not a word boundary Match a position defined as a word boundary Match a single character except for a whitespace character Match a character except for a word character Match whitespace including \t, \n, and \r and space character Match a single word character a-z, A-Z, 0-9, and underscore (_) This page provides a Python regex cheat sheet that you can quickly reference while working with regular expressions.