Detects whether the hostname given is an IP address.

    :param str hostname: Hostname to examine.
    :return: True if the hostname is an IP address, False otherwise.

def is_ipaddress(hostname):
    """Detects whether the hostname given is an IP address.

    :param str hostname: Hostname to examine.
    :return: True if the hostname is an IP address, False otherwise.
    """
    if six.PY3 and isinstance(hostname, bytes):
        # IDN A-label bytes are ASCII compatible.
        hostname = hostname.decode('ascii')

    families = [socket.AF_INET]
    if hasattr(socket, 'AF_INET6'):
        families.append(socket.AF_INET6)

    for af in families:
        try:
            inet_pton(af, hostname)
        except (socket.error, ValueError, OSError):
            pass
        else:
            return True
    return False