On 12/25/2020 8:26 PM, stackf...@gmail.com wrote:
unable to launch python3.8 -m idlelib.idle. getting below error msg. I am new 
to python. kindly help.

One should include OS with failure questions and perhaps how installed. Appears to be macOS, installed with ???

python3.8 -m idlelib.idle

For 3.x, '.idle' is not needed.

   File 
"/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/idlelib/rpc.py", 
line 73, in <module>
     class RPCServer(socketserver.TCPServer):
AttributeError: module 'socketserver' has no attribute 'TCPServer'

https://docs.python.org/3.8/library/socketserver.html#socketserver.TCPServer
It is very much supposed to, so you installation seems faulty. I am running IDLE on macOS with 3.8, 3.9, and 3.10, installed with the python.org installer.

This is one of the few circumstances for which I suggest re-installing.

--
Terry Jan Reedy

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