IP address broken with --net=host

[jennydaman]

docker run --rm --net=host fnndsc/pfurl --http 127.0.0.1:5010/api/v1/cmd
Traceback (most recent call last):
File "/usr/local/bin/pfurl", line 23, in <module>
str_defIP   = [l for l in ([ip for ip in socket.gethostbyname_ex(socket.gethostname())[2] if not ip.startswith("127.")][:1], [[(s.connect(('8.8.8.8', 53)), s.getsockname()[0], s.close()) for s in [socket.socket(socket.AF_INET, socket.SOCK_DGRAM)]][0][1]]) if l][0][0]
socket.gaierror: [Errno -2] Name or service not known