TypeError: 'in <string>' requires string as left operand, not bytes

[JoffreyN]

Traceback (most recent call last): File "<pyshell#1>", line 1, in print(conn.invoke(interface, method, param.encode('ascii'))) File "D:\Program Files\Python36\lib\site-packages\dubbo_telnet-1.0.1b3-py3.6.egg\dubbo_telnet_init_.py", line 84, in invoke return self.do(cmd) File "D:\Program Files\Python36\lib\site-packages\dubbo_telnet-1.0.1b3-py3.6.egg\dubbo_telnet_init_.py", line 65, in do tn.write('\n') File "D:\Program Files\Python36\lib\telnetlib.py", line 287, in write if IAC in buffer: TypeError: 'in ' requires string as left operand, not bytes