Email Plus Addressing Cleaner

scratch.py

# This is free and unencumbered software released into the public domain.
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import regex  # builtin `re` module doesn't like variable lookbehinds
from builtins import print


def clean_email_plus_addressing(email):
    plus_matcher = regex.compile('(?<=.+?)\\+.*(?=\\@.+=?\\.=?)')
    cleaned_email = regex.sub(plus_matcher, '', email)
    return cleaned_email


if __name__ == '__main__':
    # https://regexr.com/60sng
    assert clean_email_plus_addressing('asdf1234+ss@email.au') == 'asdf1234@email.au'
    assert clean_email_plus_addressing('lkjh@email.co.tz') == 'lkjh@email.co.tz'
    assert clean_email_plus_addressing('123qwert123+123zxcv123@email123.com') == '123qwert123@email123.com'
    assert clean_email_plus_addressing('zxcv123++123+asdf+123++@email++.co.uk') == 'zxcv123@email++.co.uk'
    print('Asserts all pass!')