`ValueError: I/O operation on closed file` when I exit REPL

[eggplants]

$ python -V
Python 3.8.8
$ ptpython --version
3.0.18
$ ptpython
>>> exit()

Traceback (most recent call last):
  File "/home/eggplants/.pyenv/versions/3.8.8/bin/ptpython", line 8, in <module>
    sys.exit(run())
  File "/home/eggplants/.pyenv/versions/3.8.8/lib/python3.8/site-packages/ptpython/entry_points/run_ptpython.py", line 207, in run
    embed(
  File "/home/eggplants/.pyenv/versions/3.8.8/lib/python3.8/site-packages/ptpython/repl.py", line 720, in embed
    repl.run()
  File "/home/eggplants/.pyenv/versions/3.8.8/lib/python3.8/site-packages/ptpython/repl.py", line 135, in run
    text = self.read()
  File "/home/eggplants/.pyenv/versions/3.8.8/lib/python3.8/site-packages/ptpython/python_input.py", line 1045, in read
    result = self.app.run(pre_run=pre_run, in_thread=True)
  File "/home/eggplants/.pyenv/versions/3.8.8/lib/python3.8/site-packages/prompt_toolkit/application/application.py", line 874, in run
    raise exception
  File "/home/eggplants/.pyenv/versions/3.8.8/lib/python3.8/site-packages/prompt_toolkit/application/application.py", line 855, in run_in_thread
    result = self.run(
  File "/home/eggplants/.pyenv/versions/3.8.8/lib/python3.8/site-packages/prompt_toolkit/application/application.py", line 891, in run
    return loop.run_until_complete(
  File "/home/eggplants/.pyenv/versions/3.8.8/lib/python3.8/asyncio/base_events.py", line 616, in run_until_complete
    return future.result()
  File "/home/eggplants/.pyenv/versions/3.8.8/lib/python3.8/site-packages/prompt_toolkit/application/application.py", line 816, in run_async
    return await _run_async2()
  File "/home/eggplants/.pyenv/versions/3.8.8/lib/python3.8/site-packages/prompt_toolkit/application/application.py", line 792, in _run_async2
    result = await _run_async()
  File "/home/eggplants/.pyenv/versions/3.8.8/lib/python3.8/site-packages/prompt_toolkit/application/application.py", line 721, in _run_async
    with self.input.raw_mode(), self.input.attach(
  File "/home/eggplants/.pyenv/versions/3.8.8/lib/python3.8/site-packages/prompt_toolkit/input/vt100.py", line 129, in raw_mode
    return raw_mode(self.stdin.fileno())
ValueError: I/O operation on closed file

[johnfaucette]

I can confirm exact same error on Python 3.9.5. Also perhaps relevant I'm using zsh and on a macbook.

[eggplants]

@johnfaucette Yeah, I'm using zsh and Ubuntu 21.04.

[RyannDaGreat]

Same thing happens when you call quit()

[innateessence]

This doesn't have anything to do with using zsh or a mac as far as I'm aware. It happens on sh, bash, and xonsh. It also happens on WSL2

[innateessence]

Looks like we should reference this in prompt toolkit

[innateessence]

Relevant Issue: prompt-toolkit/python-prompt-toolkit#1456

[jonathanslenders]

I'm not sure how this suddenly turned up. I can't reproduce it when running exit(), but I can when running sys.stdin.close().

This pull request should fix it: prompt-toolkit/python-prompt-toolkit#1457
Would any of you be able to test it? Then I'll merge it.

edit: this is probably the only thing we really need: https://github.com/prompt-toolkit/ptpython/pull/466/files

[eggplants]

@jonathanslenders It seems to work well. Thank you so much...!

$ pip uninstall prompt-toolkit ptpython -y
$ pip install 'git+https://github.com/prompt-toolkit/python-prompt-toolkit@fix-valueerror-io-operation-on-closed-file' ptpython
$ ptpython
>>> exit() # no error!!!
$

[jonathanslenders]

I pushed a new release to PyPI, so you should also be able to get it from there. Thanks for testing!