turtle> select 10
Not a valid selection
Exception in thread Thread-2:
Traceback (most recent call last):
File "/usr/lib/python3.4/threading.py", line 920, in _bootstrap_inner
self.run()
File "/usr/lib/python3.4/threading.py", line 868, in run
self._target(*self._args, **self._kwargs)
File "server.py", line 141, in work
start_turtle()
File "server.py", line 65, in start_turtle
target, conn = get_target(cmd)
TypeError: 'NoneType' object is not iterable
turtle> list ----- Clients -----
No command is accepted after this exception.