I will be short and *you* will understand what I wrote.

1) Applications are exchanging data/text in a text mode and only in text mode.
An application does not know what is a byte and consequently the coding
of characters.

2) It is however possible to pass/transfer "an encoded text" as text. For this
one needs a codecs which covers the complete byte range. This is where Python
fails.

Small illustration. piping from an "utf-16 output" to a reciever application.
The transfer should always succeed and it is up to the reciever to know what
to do with the incoming text, even if it represents bytes.

(U+8161)
>>> '腡'.encode('utf-16-le').decode('latin1')
'a\x81'
>>> '腡'.encode('utf-16-le').decode('cp1252')
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "c:\Python311\Lib\encodings\cp1252.py", line 15, in decode
return codecs.charmap_decode(input,errors,decoding_table)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
UnicodeDecodeError: 'charmap' codec can't decode byte 0x81 in position 1: character maps to <undefined>
>>>

cp1252 beeing the os.device_encoding, the "transfer encoding"

It is very to easy to mimick this behaviour in PowerShell with Python, just by using
a keyboard, understand text.

You may argue, "use bytes". This will no work, or only work with and within
Python applications (decoding the sys.stdout.buffer). A non sense, because
applications are "speaking text."

---

What I presented has nothing to do with the exemples of the guy who is
not using the coding of characters correctly.

It is similar to the issues, that this "US-girl" (?) presented some time ago. She
had difficulties to "pipe" in PowerShell.

That's my understanding.

1) Sorry: Eryk Sun

2) If "Qt" is installed, there is QProcess to toy with

3)
PS C:\humour> # C# in action
PS C:\humour>
PS C:\humour> $a = "import subprocess;"
PS C:\humour> $b = "p = subprocess.run(['.\\textcs.exe'], shell=True, capture_output=True, text=True);"
PS C:\humour> $c = "print(p)"
PS C:\humour> py311 -c ($a + $b + $c)
CompletedProcess(args=['.\\textcs.exe'], returncode=0, stdout='abc需\n', stderr='')
PS C:\humour>
PS C:\humour> .\textcs.exe
abc需
PS C:\humour>

Yes, but...