I broke the self.choices collection code into two parts:
append the choices in "normalized" form
select an appropriate default
This requires mutation of the key, so I changed the type from tuple to list, which in this case is functionally equivalent except that tuples are immutable.
The other piece that was missing had to do with h/H keys being handled differently than a standard choice (i.e., the _help_active flag is set), so I added a conditional in set_answer for that, which allows users to hit Enter without None becoming the selected value. The choice to use a special "__HELP__" value is to avoid disallowing users to choose None as a value, which also seems to be how KeyboardInterrupt (Ctrl-C) is handled.
tjb1982
commented
5 years ago
I broke the
self.choicescollection code into two parts:This requires mutation of the key, so I changed the type from
tupletolist, which in this case is functionally equivalent except that tuples are immutable.The other piece that was missing had to do with
h/Hkeys being handled differently than a standard choice (i.e., the_help_activeflag is set), so I added a conditional inset_answerfor that, which allows users to hitEnterwithoutNonebecoming the selected value. The choice to use a special"__HELP__"value is to avoid disallowing users to chooseNoneas a value, which also seems to be howKeyboardInterrupt(Ctrl-C) is handled.