Function _find_mac_near_keyword

Lib/uuid.py:474–506

Searches a command's output for a MAC address near a keyword. Each line of words in the output is case-insensitively searched for any of the given keywords. Upon a match, get_word_index is invoked to pick a word from the line, given the index of the match. For example, lambda i: 0

(command, args, keywords, get_word_index)

def _find_mac_near_keyword(command, args, keywords, get_word_index):
    """Searches a command's output for a MAC address near a keyword.

    Each line of words in the output is case-insensitively searched for
    any of the given keywords.  Upon a match, get_word_index is invoked
    to pick a word from the line, given the index of the match.  For
    example, lambda i: 0 would get the first word on the line, while
    lambda i: i - 1 would get the word preceding the keyword.
    """
    stdout = _get_command_stdout(command, args)
    if stdout is None:
        return None

    first_local_mac = None
    for line in stdout:
        words = line.lower().rstrip().split()
        for i in range(len(words)):
            if words[i] in keywords:
                try:
                    word = words[get_word_index(i)]
                    mac = int(word.replace(_MAC_DELIM, b''), 16)
                except (ValueError, IndexError):
                    # Virtual interfaces, such as those provided by
                    # VPNs, do not have a colon-delimited MAC address
                    # as expected, but a 16-byte HWAddr separated by
                    # dashes. These should be ignored in favor of a
                    # real MAC address
                    pass
                else:
                    if _is_universal(mac):
                        return mac
                    first_local_mac = first_local_mac or mac
    return first_local_mac or None


def _parse_mac(word):