Good Enough(TM) email address finder

email_finder.py

import re

pattern = re.compile(
    r'(mailto:)?(?P<email>[^(\s|<|\[))]*@[^\s]*\.[^(\s|>|;|,|\])]*)'
)

test_data = '''
    This is a@b.com string with some Email Addresses 
    <email@addresses.com> in it. There are also
    some mailto:test@example.com addresses in here too.
'''

for match in pattern.finditer(test_data):
    print match.groupdict().get('email')

# would print:
# a@b.com
# email@addresses.com
# test@example.com