I can't run any Dash app, even minimal examples

Dash Python
1

Context:

  • I’m running the Python script on Pycharm in a linux OS;
  • This is not the first time this is happening, when it happened before I couldn’t pip install from the Pycharm console either, what solved the problem was updating the system then restarting it;
  • The system is already up-to-date and I’ve already restarted it also;
  • This problem started randomly both times, I haven’t changed anything in the code
  • It’s not related to the if __name__ = '__main__' line, as it’s shown on the screenshot below
  • My problem is exactly the same as the last person who replied on this topic
  • I’ve also tried changing the debug mode from True to False and it didn’t changed anything
  • And I’ve also tried dealing with Pycharm itself: reloading from disk and repairing the IDE, didn’t work.

No Dash app is running, even the minimal examples, but a minimal Flask app works:

When I run the Flask app:

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When I run the Dash app, I get no output whatsoever, it just gets stuck:

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When I go to the localhost page, this is what happens:

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2

Hello @Galliard,

Have you tried with a completely new virtual environment?

3

Actually it just as randomly started working again:

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image1268×1075 87.2 KB

I’ll try changing the venv as you suggested next time that happens and if it doesn’t work I’ll post here again if it isn’t seem as necrobumping, thanks anyways.

Edit: But I don’t think the venv is related also, because the other project using Dash app that didn’t run had a completely different venv, not to mention that this problem started and stopped with no obvious reasons, almost randomly.