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Update docs/guide/devtools.md

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Co-authored-by: Will McGugan <willmcgugan@gmail.com>
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Dave Pearson
2022-10-14 18:55:13 +01:00
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@@ -23,7 +23,9 @@ You can run Textual apps with the `run` subcommand. If you supply a path to a Py
textual run my_app.py
```
The `run` sub-command will look to see if you have an `App` instance called `app` in the global scope of your Python file and will use that if it does. If not it will then look to see if there is a class that inherits from `App` and it will create and `run` an instance of that. Finally, you can specify the application instance to run with a colon following the filename:
The `run` sub-command will first look for a `App` instance called `app` in the global scope of your Python file. If there is no `app`, it will create an instance of the first `App` class it finds and run that.
Alternatively, you can add the name of an `App` instance or class after a colon to run a specific app in the Python file. Here's an example:
```bash
textual run my_app.py:alternative_app