client.loop_forever() error !!!!!

[knsg0d]

Traceback (most recent call last):
File "test.py", line 26, in
client.loop_forever()
File "/home/pi/paho-mqtt/lib/python3.4/site-packages/paho/mqtt/client.py", line 1481, in loop_forever
rc = self.loop(timeout, max_packets)
File "/home/pi/paho-mqtt/lib/python3.4/site-packages/paho/mqtt/client.py", line 1003, in loop
rc = self.loop_read(max_packets)
File "/home/pi/paho-mqtt/lib/python3.4/site-packages/paho/mqtt/client.py", line 1284, in loop_read
rc = self._packet_read()
File "/home/pi/paho-mqtt/lib/python3.4/site-packages/paho/mqtt/client.py", line 1849, in _packet_read
rc = self._packet_handle()
File "/home/pi/paho-mqtt/lib/python3.4/site-packages/paho/mqtt/client.py", line 2305, in _packet_handle
return self._handle_publish()
File "/home/pi/paho-mqtt/lib/python3.4/site-packages/paho/mqtt/client.py", line 2500, in _handle_publish
self._handle_on_message(message)
File "/home/pi/paho-mqtt/lib/python3.4/site-packages/paho/mqtt/client.py", line 2647, in _handle_on_message
self.on_message(self, self._userdata, message)
File "test.py", line 14, in on_message
print(msg.topic+" "+str(msg.payload))
File "/home/pi/paho-mqtt/lib/python3.4/site-packages/paho/mqtt/client.py", line 360, in topic
return self._topic.decode('utf-8')
UnicodeDecodeError: 'utf-8' codec can't decode byte 0xe7 in position 31: invalid continuation byte

[knsg0d]

File "test123.py", line 24, in
client.loop_forever()
File "/usr/local/lib/python2.7/dist-packages/paho_mqtt-1.3.1-py2.7.egg/paho/mqtt/client.py", line 1481, in loop_forever
rc = self.loop(timeout, max_packets)
File "/usr/local/lib/python2.7/dist-packages/paho_mqtt-1.3.1-py2.7.egg/paho/mqtt/client.py", line 1003, in loop
rc = self.loop_read(max_packets)
File "/usr/local/lib/python2.7/dist-packages/paho_mqtt-1.3.1-py2.7.egg/paho/mqtt/client.py", line 1284, in loop_read
rc = self._packet_read()
File "/usr/local/lib/python2.7/dist-packages/paho_mqtt-1.3.1-py2.7.egg/paho/mqtt/client.py", line 1849, in _packet_read
rc = self._packet_handle()
File "/usr/local/lib/python2.7/dist-packages/paho_mqtt-1.3.1-py2.7.egg/paho/mqtt/client.py", line 2305, in _packet_handle
return self._handle_publish()
File "/usr/local/lib/python2.7/dist-packages/paho_mqtt-1.3.1-py2.7.egg/paho/mqtt/client.py", line 2500, in _handle_publish
self._handle_on_message(message)
File "/usr/local/lib/python2.7/dist-packages/paho_mqtt-1.3.1-py2.7.egg/paho/mqtt/client.py", line 2647, in _handle_on_message
self.on_message(self, self._userdata, message)
File "test123.py", line 12, in on_message
print(msg.topic+" "+str(msg.payload))
File "/usr/local/lib/python2.7/dist-packages/paho_mqtt-1.3.1-py2.7.egg/paho/mqtt/client.py", line 360, in topic
return self._topic.decode('utf-8')
File "/usr/lib/python2.7/encodings/utf_8.py", line 16, in decode
return codecs.utf_8_decode(input, errors, True)
UnicodeDecodeError: 'utf8' codec can't decode byte 0xe7 in position 31: invalid continuation byte

[knsg0d]

I am facing with these error Please help me to fix this :(