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comp / comp.lang.python / Re: Tools to help with text mode (i.e. non-GUI) input

SubjectAuthor
* Re: Tools to help with text mode (i.e. non-GUI) inputAlan Gauld
`* Re: Tools to help with text mode (i.e. non-GUI) inputChris Green
 +- Re: Tools to help with text mode (i.e. non-GUI) inputStefan Ram
 +- Re: Tools to help with text mode (i.e. non-GUI) inputGrant Edwards
 `- Re: Tools to help with text mode (i.e. non-GUI) inputAlan Gauld

1
Subject: Re: Tools to help with text mode (i.e. non-GUI) input
From: Alan Gauld
Newsgroups: comp.lang.python
Date: Tue, 14 Jan 2025 08:56 UTC
References: 1 2 3 4
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From: learn2program@gmail.com (Alan Gauld)
Newsgroups: comp.lang.python
Subject: Re: Tools to help with text mode (i.e. non-GUI) input
Date: Tue, 14 Jan 2025 08:56:14 +0000
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On 14/01/2025 00:20, Grant Edwards via Python-list wrote:
> On 2025-01-13, Alan Gauld via Python-list <python-list@python.org> wrote:
>
>> All of that is possible in curses, you just have to code it.
>
> All of that is easy with curses in C. Unfortunately, the high level
> "panel" and "menu" curses subystems that make it easy aren't included
> in the Python curses API,

panel is included. Just import curses.panel.

menu unfortunately isn't but it's not difficult to roll
your own by creating a window with a list of options, provided
you don't try to get too fancy(submenus etc).

--
Alan G
Author of the Learn to Program web site
http://www.alan-g.me.uk/
http://www.amazon.com/author/alan_gauld
Follow my photo-blog on Flickr at:
http://www.flickr.com/photos/alangauldphotos

Subject: Re: Tools to help with text mode (i.e. non-GUI) input
From: Chris Green
Newsgroups: comp.lang.python
Date: Tue, 14 Jan 2025 09:15 UTC
References: 1 2 3 4 5
Path: news.eternal-september.org!eternal-september.org!feeder3.eternal-september.org!fu-berlin.de!uni-berlin.de!individual.net!not-for-mail
From: cl@isbd.net (Chris Green)
Newsgroups: comp.lang.python
Subject: Re: Tools to help with text mode (i.e. non-GUI) input
Date: Tue, 14 Jan 2025 09:15:01 +0000
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Alan Gauld <learn2program@gmail.com> wrote:
> On 14/01/2025 00:20, Grant Edwards via Python-list wrote:
> > On 2025-01-13, Alan Gauld via Python-list <python-list@python.org> wrote:
> >
> >> All of that is possible in curses, you just have to code it.
> >
> > All of that is easy with curses in C. Unfortunately, the high level
> > "panel" and "menu" curses subystems that make it easy aren't included
> > in the Python curses API,
>
> panel is included. Just import curses.panel.
>
> menu unfortunately isn't but it's not difficult to roll
> your own by creating a window with a list of options, provided
> you don't try to get too fancy(submenus etc).
>
Yes, thanks all, maybe just straightforward curses is the way to go.
Looking at some of the 'cleverer' ones they end up looking remarkably
like GUI code, in which case I might as well use a GUI. I have written
a (fairly simple) Gtk based python program, I was just trying to avoid
all the GUI overheads for a little new project.

--
Chris Green
ยท

Subject: Re: Tools to help with text mode (i.e. non-GUI) input
From: Stefan Ram
Newsgroups: comp.lang.python
Organization: Stefan Ram
Date: Tue, 14 Jan 2025 11:22 UTC
References: 1 2 3 4 5 6
Path: news.eternal-september.org!eternal-september.org!feeder3.eternal-september.org!fu-berlin.de!uni-berlin.de!not-for-mail
From: ram@zedat.fu-berlin.de (Stefan Ram)
Newsgroups: comp.lang.python
Subject: Re: Tools to help with text mode (i.e. non-GUI) input
Date: 14 Jan 2025 11:22:15 GMT
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Chris Green <cl@isbd.net> wrote or quoted:
>Yes, thanks all, maybe just straightforward curses is the way to go.
>Looking at some of the 'cleverer' ones they end up looking remarkably
>like GUI code, in which case I might as well use a GUI. I have written
>a (fairly simple) Gtk based python program, I was just trying to avoid
>all the GUI overheads for a little new project.

The Cmd class is your go-to for whipping up those bare-bones
command line interfaces. It's hella useful for cobbling
together test rigs, admin tools, and rough drafts that'll
eventually get a facelift with some fancy UI.

Check out this sample of what Cmd code might look like:

class TurtleShell( cmd.Cmd ):
intro = 'Welcome to the turtle shell. Type help or ?.\n'
prompt = '(turtle) '
file = None

def do_forward(self, arg):
'Move the turtle forward by the specified distance: FORWARD 10'
forward(*parse(arg))
. . .
. . .
.. . .

And here's a taste of what a Cmd UI could shape up to be:

Welcome to the turtle shell. Type help or ? to list commands.

(turtle) ?

Documented commands (type help <topic>):
========================================
bye color goto home playback record right
circle forward heading left position reset undo

(turtle) help forward
Move the turtle forward by the specified distance: FORWARD 10
(turtle) record spiral.cmd
(turtle) position
Current position is 0 0
.. . .

Subject: Re: Tools to help with text mode (i.e. non-GUI) input
From: Grant Edwards
Newsgroups: comp.lang.python
Date: Wed, 15 Jan 2025 00:54 UTC
References: 1 2 3 4 5 6 7
Path: news.eternal-september.org!eternal-september.org!feeder3.eternal-september.org!fu-berlin.de!uni-berlin.de!not-for-mail
From: grant.b.edwards@gmail.com (Grant Edwards)
Newsgroups: comp.lang.python
Subject: Re: Tools to help with text mode (i.e. non-GUI) input
Date: Tue, 14 Jan 2025 19:54:09 -0500 (EST)
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On 2025-01-14, Chris Green via Python-list <python-list@python.org> wrote:

> Yes, thanks all, maybe just straightforward curses is the way to go.
> Looking at some of the 'cleverer' ones they end up looking remarkably
> like GUI code, in which case I might as well use a GUI.

The source code to configure and handle a UI with a certain set of
input widgets is going to be pretty much the same regardless of the
low-level screen bashing details involved in rendering the widgets.

You choose a TUI toolkit like curses panel/menu/forms instead of a GUI
toolkit like gtk because you need your app to run on a terminal
instead of on a X11/wayland screen, not because you want your app to
be simpler than the code for a GUI app (as you've seen, it isn't).

> I have written a (fairly simple) Gtk based python program, I was
> just trying to avoid all the GUI overheads for a little new project.

If you want to avoid the [TG]UI overhead, then command line options
are your friend. If that's not sophisticated enough the gnu "readline"
library with a simple command processor is a common next step.

Or you can use curses to print some help stuff at the top of the
terminal window and then do everything based on single-stroke "command
keys" that print output in the lower part of the terminal window.

--
Grant

Subject: Re: Tools to help with text mode (i.e. non-GUI) input
From: Alan Gauld
Newsgroups: comp.lang.python
Date: Thu, 16 Jan 2025 01:06 UTC
References: 1 2 3 4 5 6 7 8
Path: news.eternal-september.org!eternal-september.org!feeder3.eternal-september.org!fu-berlin.de!uni-berlin.de!not-for-mail
From: learn2program@gmail.com (Alan Gauld)
Newsgroups: comp.lang.python
Subject: Re: Tools to help with text mode (i.e. non-GUI) input
Date: Thu, 16 Jan 2025 01:06:07 +0000
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On 15/01/2025 00:54, Grant Edwards via Python-list wrote:

> are your friend. If that's not sophisticated enough the gnu "readline"
> library with a simple command processor is a common next step.

On that front the cmd module in Python is often overlooked
but is useful for structuring a non-GUI-like text UI.

It doesn't support mouse or screen mapping or colours etc.
But if all you want/need is a pdb type interface it works well.

--
Alan G
Author of the Learn to Program web site
http://www.alan-g.me.uk/
http://www.amazon.com/author/alan_gauld
Follow my photo-blog on Flickr at:
http://www.flickr.com/photos/alangauldphotos

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