Writing to clipboard in Python 3.11

[MRAB]

On 2023-11-06 00:51, Rob Cliffe via Python-list wrote:
> Recently I switched from Python 3.8.3 to Python 3.11.4.  A strange
> problem appeared which was not there before:
> I am using the win32clipboard backage (part of pywin32), and when I use
> SetClipboardData() to write text which consists ENTIRELY OF DIGITS to
> the clipboard, I either get an error (not always the same error message)
> or a program crash.  The problem does not appear if I use
> SetClipboardText() instead.
> Sample program:
> 
> from win32clipboard import *
> OpenClipboard()
> SetClipboardData(CF_UNICODETEXT, "A")
> SetClipboardData(CF_UNICODETEXT, "A0")
> SetClipboardData(CF_UNICODETEXT, "0A")
> SetClipboardText("0", CF_UNICODETEXT)
> print("OK so far")
> SetClipboardData(CF_UNICODETEXT, "0")
> CloseClipboard()
> 
> Sample output:
> 
> OK so far
> Traceback (most recent call last):
>     File "R:\W.PY", line 8, in <module>
>       SetClipboardData(CF_UNICODETEXT, "0")
> pywintypes.error: (0, 'SetClipboardData', 'No error message is available')
> 
> I can get round the problem by using SetClipboardText().  But can anyone
> shed light on this?

It also happens in Python 3.10, but not Python 3.9.