Why can't I change the host and port that my Flask app runs on?

Question

I want to change the host and port that my app runs on. I set host and port in app.run, but the flask run command still r

Answer 1

When you run the application server using the flask run command, the __name__ of the module is not "__main__". So the if block in your code is not executed -- hence the server is not getting bound to 0.0.0.0, as you expect.

For using this command, you can bind a custom host using the --host flag.

flask run --host=0.0.0.0

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