On 16/10/2020 13:55, Chris Angelico wrote:
> On Fri, Oct 16, 2020 at 11:08 PM Rob Cliffe <rob.cliffe@btinternet.com> wrote:
>>
>>
>> On 16/10/2020 11:59, Chris Angelico wrote:
>>> On Fri, Oct 16, 2020 at 8:21 PM Rob Cliffe via Python-ideas
>>> <python-ideas@python.org> 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
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