def instance_ip_grouping_key():
with closing(socket.socket(socket.AF_INET, socket.SOCK_DGRAM)) as s:<EOL><INDENT>s.connect(('<STR_LIT:localhost>', <NUM_LIT:0>))<EOL>return {'<STR_LIT>': s.getsockname()[<NUM_LIT:0>]}<EOL><DEDENT>
Grouping key with instance set to the IP Address of this host.