And now the problem has disappeared.  I recently upgraded to the new High 
Sierra.  Perhaps it was related to that?

On Thursday, March 29, 2018 at 3:19:29 PM UTC-4, Gideon Simpson wrote:
>
> More weird stuff.  If I open a terminal and immediately close it (with 
> Ctrl-D), it's fine.  If I do anything, even
> ls
> then when I hit Ctrl-D, I generate that error.
>
>
> On Tuesday, March 27, 2018 at 12:30:17 AM UTC-4, Gideon Simpson wrote:
>>
>> When trying to close a terminal in jupyter, I get the following error.  
>> Any suggestions?
>>
>>
>>
>> [E 00:23:09.324 NotebookApp] Uncaught exception in /terminals/websocket/1
>>
>>     Traceback (most recent call last):
>>
>>       File "/anaconda3/lib/python3.6/site-packages/tornado/websocket.py", 
>> line 498, in _run_callback
>>
>>         result = callback(*args, **kwargs)
>>
>>       File 
>> "/anaconda3/lib/python3.6/site-packages/notebook/terminal/handlers.py", 
>> line 37, in on_message
>>
>>         super(TermSocket, self).on_message(message)
>>
>>       File 
>> "/anaconda3/lib/python3.6/site-packages/terminado/websocket.py", line 81, 
>> in on_message
>>
>>         self.terminal.ptyproc.write(command[1])
>>
>>       File 
>> "/anaconda3/lib/python3.6/site-packages/ptyprocess/ptyprocess.py", line 
>> 829, in write
>>
>>         return super(PtyProcessUnicode, self).write(b)
>>
>>       File 
>> "/anaconda3/lib/python3.6/site-packages/ptyprocess/ptyprocess.py", line 
>> 555, in write
>>
>>         return self._writeb(s, flush=flush)
>>
>>       File 
>> "/anaconda3/lib/python3.6/site-packages/ptyprocess/ptyprocess.py", line 
>> 547, in _writeb
>>
>>         self.fileobj.flush()
>>
>>     OSError: [Errno 5] Input/output error
>>
>>  
>>
>>
>>
>>

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