def str_to_int()

in scripts/ValidateParameters/netaddr/strategy/eui48.py [0:0]

• 29 lines of code
• 13 McCabe index (conditional complexity)

def str_to_int(addr):
    """
    :param addr: An IEEE EUI-48 (MAC) address in string form.

    :return: An unsigned integer that is equivalent to value represented
        by EUI-48/MAC string address formatted according to the dialect
        settings.
    """
    words = []
    if _is_str(addr):
        found_match = False
        for regexp in RE_MAC_FORMATS:
            match_result = regexp.findall(addr)
            if len(match_result) != 0:
                found_match = True
                if isinstance(match_result[0], tuple):
                    words = match_result[0]
                else:
                    words = (match_result[0],)
                break
        if not found_match:
            raise AddrFormatError('%r is not a supported MAC format!' % addr)
    else:
        raise TypeError('%r is not str() or unicode()!' % addr)

    int_val = None

    if len(words) == 6:
        #   2 bytes x 6 (UNIX, Windows, EUI-48)
        int_val = int(''.join(['%.2x' % int(w, 16) for w in words]), 16)
    elif len(words) == 3:
        #   4 bytes x 3 (Cisco)
        int_val = int(''.join(['%.4x' % int(w, 16) for w in words]), 16)
    elif len(words) == 2:
        #   6 bytes x 2 (PostgreSQL)
        int_val = int(''.join(['%.6x' % int(w, 16) for w in words]), 16)
    elif len(words) == 1:
        #   12 bytes (bare, no delimiters)
        int_val = int('%012x' % int(words[0], 16), 16)
    else:
        raise AddrFormatError('unexpected word count in MAC address %r!' % addr)

    return int_val