
Traceback (most recent call last):


 "/usr/local/lib/python3.6/dist-packages/wx/lib/intctrl.py", line 509, in OnText

if value != self.__oldvalue:

AttributeError: 'IntCtrl' object has no attribute '_IntCtrl__oldvalue'

Traceback (most recent call last):


 "C:\Users\w10\anaconda3\lib\site-packages\tornado\ioloop.py", line 743, in _run_callback

ret = callback()


 "C:\Users\w10\anaconda3\lib\site-packages\jupyter_client\threaded.py", line 83, in thread_send

self.session.send(self.stream, msg)


 "C:\Users\w10\anaconda3\lib\site-packages\jupyter_client\session.py", line 747, in send

to_send = self.serialize(msg, ident)


 "C:\Users\w10\anaconda3\lib\site-packages\jupyter_client\session.py", line 660, in serialize

signature = self.sign(real_message)


 "C:\Users\w10\anaconda3\lib\site-packages\jupyter_client\session.py", line 606, in sign

return str_to_bytes(h.hexdigest())


 "C:\Users\w10\anaconda3\lib\site-packages\ipython_genutils\py3compat.py", line 21, in encode

return u.encode(encoding, "replace")
NotImplementedError: encoding with 'cp1252' codec failed (NotImplementedError: )
