I agree with Guido here. Although I really don't care about the capability myself, it feels like enough people do want a "clear screen" function... and from the discussion, in feels like there are a LOT of variations in how to do it across different operating systems, OS versions, terminals, shells, etc. Having a common interface of `os.clear()` that did whatever funny thing a particular environment needed would save some folks trouble. Of course, I'm not certain how far it is possible to auto-detect the environment details within that function to "do the right thing" ... but probably there are clever hacks that get to 90% working. On Fri, Oct 16, 2020 at 1:03 PM Rob Cliffe via Python-ideas < python-ideas@python.org> wrote:
On 16/10/2020 13:55, Chris Angelico wrote:
On Fri, Oct 16, 2020 at 11:08 PM Rob Cliffe
wrote: On 16/10/2020 11:59, Chris Angelico wrote:
On Fri, Oct 16, 2020 at 8:21 PM Rob Cliffe via Python-ideas
wrote: On 13/10/2020 23:35, Guido van Rossum wrote:
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?
Sometimes I want a program that displays (more than 1 line of) real-time information in a Windows CMD box and refreshes it every few seconds (e.g. progress displays, monitoring open files/locks/connections/downloads etc.). It is natural to clear the screen and display the updated information. Natural perhaps, but ugly. Much better to reposition the cursor and overwrite the previous text, with "clear to end of line" as required; that way, you avoid flicker.
C I do precisely that in many of my programs for e.g. single-line progress displays. But for multi-line output I don't know of any way to move the cursor back up. I work in Windows 10. Try \x1b[A to move up a line, should work.
ChrisA Thanks Chris, but no luck. It just echoes it, with the \x1b (Escape) echoed as a character that looks like a question mark inside a box. Earlier I did try googling for ways of moving the cursor, but almost all I found was ways of moving the *mouse* cursor, and the rest was irrelevant. Rob Cliffe _______________________________________________ Python-ideas mailing list -- python-ideas@python.org To unsubscribe send an email to python-ideas-leave@python.org https://mail.python.org/mailman3/lists/python-ideas.python.org/ Message archived at https://mail.python.org/archives/list/python-ideas@python.org/message/5VZGBR... Code of Conduct: http://python.org/psf/codeofconduct/
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