Code:
me@home:~$ calibre-debug
Welcome to the interactive calibre shell!
>>> exit()
NameError: name 'exit' is not defined
>>> quit()
NameError: name 'quit' is not defined
>>> exit
NameError: name 'exit' is not defined
>>> quit
NameError: name 'quit' is not defined
>>> let_met _out!()
SyntaxError: invalid syntax
>>>
ctrl-d does get me out, but then I need to kill it.
ctrl-c gets me out, but destroys my term as well.