def who_am_i()

in loggy.py [0:0]

• 17 lines of code
• 11 McCabe index (conditional complexity)

def who_am_i():
    """Returns the FQDN of the box the program runs on"""
    try:
        # Get local hostname (what you see in the terminal)
        local_hostname = socket.gethostname()
        # Get all address info segments for the local host
        canonical_names = [
            address[3]
            for address in socket.getaddrinfo(local_hostname, None, 0, socket.SOCK_DGRAM, 0, socket.AI_CANONNAME)
            if address[3]
        ]
        # For each canonical name, see if we find $local_hostname.something.tld, and if so, return that.
        if canonical_names:
            prefix = f"{local_hostname}."
            for name in canonical_names:
                if name.startswith(prefix):
                    return name
            # No match, just return the first occurrence.
            return canonical_names[0]
    except socket.error:
        pass
    # Fall back to socket.getfqdn
    return socket.getfqdn()