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Subject: Re: Python3 curses behavior
From: Vlasov Vitaly <vnigtha@gmail.com>
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Xref: csiph.com comp.lang.python:38608

=D1=81=D1=83=D0=B1=D0=B1=D0=BE=D1=82=D0=B0, 9 =D1=84=D0=B5=D0=B2=D1=80=D0=
=B0=D0=BB=D1=8F 2013=C2=A0=D0=B3., 23:22:47 UTC+4 =D0=BF=D0=BE=D0=BB=D1=8C=
=D0=B7=D0=BE=D0=B2=D0=B0=D1=82=D0=B5=D0=BB=D1=8C Terry Reedy =D0=BD=D0=B0=
=D0=BF=D0=B8=D1=81=D0=B0=D0=BB:
> On 2/9/2013 6:23 AM, Vlasov Vitaly wrote:
>=20
> > Hello.
>=20
> >
>=20
> > I found strange behavior of curses module, that i can't understand. I
>=20
> > initialize screen with curses.initscr(), then i create subwin of
>=20
> > screen with screen.subwin(my_subwin_sizes). After that i fill subwin
>=20
> > with my_char in for-loop. On last char in last line subwin.addch()
>=20
> > raises exception.
>=20
>=20
>=20
> I have never used curses but I have used text screens. I suspect that=20
>=20
> addch moves the cursor to the position beyond where the character is=20
>=20
> added, but there is no such position. I remember having problems writing=
=20
>=20
> to the last char of a 24x80 screen without getting either a scroll or=20
>=20
> beep if scrolling was disabled.
>=20
>=20
>=20
> > This is my problem. Why? How to fix it?
>=20
>=20
>=20
> Perhaps this will help:
>=20
> window.leaveok(yes)
>=20
> If yes is 1, cursor is left where it is on update, instead of being at=20
>=20
> =E2=80=9Ccursor position.=E2=80=9D This reduces cursor movement where pos=
sible. If=20
>=20
> possible the cursor will be made invisible.
>=20
>=20
>=20
> > (If i will ignore exception, then last char will be displayed)
>=20
>=20
>=20
> Otherwise, just catch the exception, as you already discovered.
>=20
>=20
>=20
> > Here simple example: http://pastebin.com/SjyMsHZB
>=20
>=20
>=20
> --=20
>=20
> Terry Jan Reedy

Thank you.

I tried everything in my test script.
win.leaveok() - no effect
curses.cur_vis() - no effect
win.scrollok() - start newline and place cursor on it

It's only one last option:
on last line last char try/except with pass.