On 2023-06-20 02:15:00 +0900, Inada Naoki via Python-list wrote:
> stream.flush() doesn't mean final output.
> Try stream.close()

After close() the value isn't available any more:

Python 3.11.2 (main, Mar 13 2023, 12:18:29) [GCC 12.2.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import io
>>> buffer = io.BytesIO()
>>> stream = io.TextIOWrapper(buffer, encoding='idna')
>>> stream.write('abc.example.com')
15
>>> stream.close()
>>> buffer.getvalue()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ValueError: I/O operation on closed file.

        hp

-- 
   _  | Peter J. Holzer    | Story must make more sense than reality.
|_|_) |                    |
| |   | h...@hjp.at         |    -- Charles Stross, "Creative writing
__/   | http://www.hjp.at/ |       challenge!"

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