Python URL regex pattern

urrl-regex-pattern.py

URL_PATTERN = (
    r'(?i)('
    r'(?:(?:(?:https?|ftp):)?//)'
    r'(?:\S+(?::\S*)?@)?'
    r'(?:'
    r'(?!(?:10|127)(?:\.\d{1,3}){3})'
    r'(?!(?:169\.254|192\.168)(?:\.\d{1,3}){2})'
    r'(?!172\.(?:1[6-9]|2\d|3[0-1])(?:\.\d{1,3}){2})'
    r'(?:[1-9]\d?|1\d\d|2[01]\d|22[0-3])'
    r'(?:\.(?:1?\d{1,2}|2[0-4]\d|25[0-5])){2}'
    r'(?:\.(?:[1-9]\d?|1\d\d|2[0-4]\d|25[0-4]))'
    r'|'
    r'(?:'
    r'(?:'
    r'[a-z0-9\u00a1-\uffff]'
    r'[a-z0-9\u00a1-\uffff_-]{0,62}'
    r')?'
    r'[a-z0-9\u00a1-\uffff]\.'
    r')+'
    r'(?:[a-z\u00a1-\uffff]{2,}\.?)'
    r')'
    r'(?::\d{2,5})?'
    r'(?:[/?#]\S*)?'
    r')'
)