Console scripts in virtual environment do not output to terminal in git bash

I have console scripts in my virtual environment in \env\Scripts, installed with packages (e.g. black, pytest, coverage). If I try to execute these in Git Bash, the output is not returned to the terminal.

If I use the command line tool for e.g. black with a virtual enviroment activated in Git Bash, I get a blank line returned, but no response:

$ black version.py

If I invoke black through python, I get the expected response:

$ python -m black version.py
All done! ✨ � ✨
1 file left unchanged.

If I invoke the command line tool using black from the system interpreter (i.e. not using the virtual environment), I get the expected response:

$ black version.py
All done! ✨ � ✨
1 file left unchanged.

If I pipe the output to a file, I get the output in the terminal, but nothing in the file:

$ black version.py > test.txt
All done! ✨ � ✨
1 file left unchanged.

If I invoke the command line tool with Microsoft cmd, I get the expected response:

λ black version.py
All done! ✨ � ✨
1 file left unchanged.

If I invoke the command line tool with a blank virtual environment, I get the expected response.

$ python -m venv env
$ . ./env/Scripts/activate
$ pip install black
$ black version.py
All done! ✨ � ✨
1 file left unchanged.

If I try to pip uninstall black, sys.stderr seems to be missing:

$ pip uninstall black
Found existing installation: black 22.1.0
Uninstalling black-22.1.0:
  Would remove:
    c:\users\XXX\env\lib\site-packages\_black_version.py
    c:\users\XXX\env\lib\site-packages\black-22.1.0.dist-info\*
    c:\users\XXX\env\lib\site-packages\black\*
    c:\users\XXX\env\lib\site-packages\black_primer\*
    c:\users\XXX\env\lib\site-packages\blackd\*
    c:\users\XXX\env\lib\site-packages\blib2to3\*
    c:\users\XXX\env\lib\site-packages\c249b57082ff69932638__mypyc.cp39-win_amd64.pyd
    c:\users\XXX\env\scripts\black-primer.exe
    c:\users\XXX\env\scripts\black.exe
    c:\users\XXX\env\scripts\blackd.exe
ERROR: Exception:
Traceback (most recent call last):
  File "C:\Users\XXX\env\lib\site-packages\pip\_internal\cli\base_command.py", line 167, in exc_logging_wrapper
    status = run_func(*args)
  File "C:\Users\XXX\env\lib\site-packages\pip\_internal\commands\uninstall.py", line 97, in run
    uninstall_pathset = req.uninstall(
  File "C:\Users\XXX\env\lib\site-packages\pip\_internal\req\req_install.py", line 638, in uninstall
    uninstalled_pathset.remove(auto_confirm, verbose)
  File "C:\Users\XXX\env\lib\site-packages\pip\_internal\req\req_uninstall.py", line 363, in remove
    if auto_confirm or self._allowed_to_proceed(verbose):
  File "C:\Users\XXX\env\lib\site-packages\pip\_internal\req\req_uninstall.py", line 403, in _allowed_to_proceed
    return ask("Proceed (Y/n)? ", ("y", "n", "")) != "n"
  File "C:\Users\XXX\env\lib\site-packages\pip\_internal\utils\misc.py", line 186, in ask
    response = input(message)
RuntimeError: input(): lost sys.stderr

The script is where I would expect it:

$ which black
/c/Users/XXX/env/Scripts/black

I get similar results with coverage and pytest. I re-installed Git for Windows. I am using Python 3.9.9. It feels like an environment variable or something related to the PATH that messes up stderr/stdout.

I understand this is a very specific situation, probably related to the repository that I am currently working on (which I installed in editable mode with pip install -e .).

Could somebody point me in the right direction to fix this?

posted 3 months ago

CC BY-SA 4.0

2mo ago

boudewijn21‭

36 reputation 1 1 7 1