Programming
Regexp using module re
Sample use case #1: re.findall
This is a first simple and useful example of regexp power. In this case we use to split a long string into a list of english words, including support for apostrophe words and rejecting any non word character (aka [a-zA-Z0-9]).
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>>> import re
>>> pattern = '[a-zA-Z0-9_\']+'
>>> test_string = "word palabra don't 1 Word 34 bEach"
>>> words = re.findall(pattern, test_string)
>>> words
['word', 'palabra', "don't", '1', 'Word', '34', 'bEach']