[BUG] Progress bar doesn't flush output

[bjourne]

The progress bar doesn't automatically flush so at least in my terminal it appears stuck. MWE:

path = Path('psn.log')
size = path.stat().st_size
with open(path) as f:
    with wrap_file(f, size, description = 'Parsing...') as f:
        for line in f:
            #print('', end = '', flush = True)
            pass

Uncommenting the print makes the progress bar work, but makes the code run very slow since the terminal is updated once for every line. I only want to update the progress bar when the completion percentage changes. My workaround is to write this:

        for i, line in enumerate(f):
            if i % 10_000 == 0:
                print('', end = '', flush = True)

But it would be nicer if rich handled it automagically.

[github-actions]

Thank you for your issue. Give us a little time to review it.

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This is an automated reply, generated by FAQtory

[willmcgugan]

Please repost with the issue template filled in and an MRE. https://label.dev/articles/minimal-reproducible-example/

[github-actions]

I hope we solved your problem.

If you like using Rich, you might also enjoy Textual

[bjourne]

See the snippet in the first comment. The non-flushing happens all the time with the wrap_file progress bar.