Can one of the educators on the list explain why this is such a commonly
required feature? I literally never feel the need to clear my screen -- but
I've seen this requested quite a few times in various forms, often as a bug
report "IDLE does not support CLS". I presume that this is a common thing
in other programming environments for beginners -- even C++ (given that it
was mentioned). Maybe it's a thing that command-line users on Windows are
told to do frequently? What am I missing that students want to do
frequently? Is it a holdover from the DOS age?
On Tue, Oct 13, 2020 at 11:25 AM Mike Miller <python-id...@mgmiller.net>
wrote:
>
> On 2020-10-13 06:19, Stestagg wrote:
> > For example, the pypi `console` library provides a method:
> `console.sc.reset()`
> > that behaves similarly to `CLS` on windows and also appears to be fairly
> > reliable cross-platform.
>
>
> Yes, there is more to it than appears at first glance. There is resetting
> the
> terminal, clearing the currently visible screen, and/or the scrollback
> buffer as
> well.
>
> The legacy Windows console has another limitation in that I don't believe
> it has
> a single API call to clear the whole thing. One must iterate over the
> whole
> buffer and write spaces to each cell, or some similar craziness. That's
> why
> even folks writing C++ just punt and do a system("cls") instead.
>
> With the mentioned lib console, the example above prints the ANSI codes to
> do a
> terminal reset, and while that works widely these days, it should not be
> the
> first choice. It would be better to use the cross-platform wrapper
> functions in
> the console.utils module, either:
>
> # A DOS-like reset, clears screen and scrollback, also aliased to
> cls()
> reset_terminal()
>
> # A Unix-like clear, configurable via param, and aliased to clear()
> clear_screen()
>
> -Mike
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