Re: Python curses
On Tue, 10 Jan 2023 13:17:10 -0600
David Wright <deblis@lionunicorn.co.uk> wrote:
> On Tue 10 Jan 2023 at 11:13:55 (-0500), paulf@quillandmouse.com wrote:
> > On Tue, 10 Jan 2023 09:31:26 -0600 > David Wright
> > <deblis@lionunicorn.co.uk> wrote:
>
> > > You keep mentioning "the docs" without saying which docs, so a
> > > reference might be helpful.
> >
> > Sorry. I'm using the following (and related pages):
> >
> > https://docs.python.org/3/library/curses.html
> >
> > These appear to be the most authoritative.
>
> Correct.
>
> > > On Tue 10 Jan 2023 at 09:01:17 (-0500), paulf@quillandmouse.com
> > > wrote:
> > > > On Tue, 10 Jan 2023 08:34:05 -0500 Greg Wooledge
> > > > <greg@wooledge.org> wrote:
> > > > > On Tue, Jan 10, 2023 at 08:24:11AM -0500,
> > > > > paulf@quillandmouse.com wrote:
> > > > > > What you wrote triggered something. I'd been following the
> > > > > > Python curses docs, which tell you to write, for example,
> > > > > > "A_REVERSE".
>
> No, they don't.
>
> > > > > > And Python was throwing exceptions. But based on
> > > > > > what you wrote, I substituted "curses.A_REVERSE", which
> > > > > > works.
> > > > > >
> > > > > > Problem solved... for now.
> > >
> > > Exactly: just for now.
> > >
> > > > > I'm a Python novice, but I believe what you're seeing is the
> > > > > difference between
> > > >
> > > > No, here's what happened. I was going along, and I used
> > > > "A_REVERSE" in my code, according to the online docs.
> > > > Exception, didn't recognize the name. That didn't make sense;
> > > > this attribute is basic to curses.
>
> Exactly, it's an attribute, as shown by the heading of the table
> in which you found A_REVERSE. And that attribute is a part of
> the curses module, and must be qualified with curses.A_REVERSE
> unless you import A_REVERSE (or all, *) into your namespace.
>
Correct. Actually, this should have been obvious to me if I'd been
thinking clearly. Doing a "import curses" shouldn't make bare library
symbols available in your code. It only makes sense you'd need to
address them with a prefix.
It may be argued that I shouldn't do the import this way. However, I
prefer to have "curses." in front of things imported. It makes the link
explicit, and serves to remind me of what's actually going on, when I
revisit the code in five years.
Paul
--
Paul M. Foster
Personal Blog: http://noferblatz.com
Company Site: http://quillandmouse.com
Software Projects: https://gitlab.com/paulmfoster
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