Python Regular expressions examples

regexp.py

import re
m = re.search('(?<=abc)def', 'abcdef')

# Getting first match
m.group(0) # -> 'def'


m = re.search('(?<=-)\w+', 'spam-egg')
m.group(0) # -> 'egg'

# Replace whitespace
s = re.sub( r'[\s]', '-', 'whitespace by hyphen' )

# Replce multiple occurences of whitespace
re.sub( r'\s{2,}', '', s )

# Add space after an period followed by a word
re.sub( r'(?<=\.)(?=[a-zA-Z])

# Find all words in string
re.findall( '\w+', s )

useful, thx