Textual in docker containers

[gabriele-costa]

When running Textual apps in docker containers strange characters appear on screen.

Minimal Dockerfile to reproduce

FROM python:3.9-slim

RUN pip install textual textual-dev

COPY main.py main.py

CMD ["python3", "main.py"]

Where main.py contains

from textual.app import App
from textual.widgets import Button

class Test(App):
    def compose(self):
        yield Button("Hi")

if __name__ == "__main__":
    Test().run()

When moving the mouse pointer over the terminal, numbers appear. They seem like screen coordinates.

[github-actions]

We found the following entries in the FAQ which you may find helpful:

• How do I center a widget in a screen?
• Does Textual support images?
• Why doesn't Textual look good on macOS?

Feel free to close this issue if you found an answer in the FAQ. Otherwise, please give us a little time to review.

This is an automated reply, generated by FAQtory

[TomJGooding]

Those strange characters are the ANSI escape sequences that control the terminal.

I'm not super familiar with docker, but how are you running the container? For example, are you using the i (interactive) or t (tty) flags?

[gabriele-costa]

You are right, the -t flag apparently solved the issue (which perfectly makes sense since the terminal type clearly matters). Thank you very much for your kind and prompt answer

[github-actions]

Don't forget to star the repository!

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