How do you use the scalene extension with VS Code?

[jmfontana]

When I introduce the lines:

scalene_profiler.start()
and
scalene_profiler.stop()

at the beginning and end of my python scripts and run them from VS Code, I get this error:

"ERROR: Do not try to invoke start if you have not called Scalene using one of the methods
in https://github.com/plasma-umass/scalene#using-scalene
(The most likely issue is that you need to run your code with scalene, not python)."

That doesn't happen if I run it on the terminal by doing:

% scalene script.py

but then, I wonder, how does one profile scripts with the VS Code extension?

[emeryberger]

To use the extension, you don't modify your code at all! You just run the extension on your program.

[jmfontana]

Thanks. I'm not sure what you mean by running the extension on my program. I have the scalene extension installed in VS Code but when I execute a script, I don't get any 'profile.html' created. I only get this file to be created and the browser open it automatically if I run scalene from the terminal.

[emeryberger]

You need to click Command-Shift-P (or Ctrl-Shift-P) to open the Command Palette. Then select "Scalene: AI-powered profiling..." (you can start typing Scalene and it will pop up if it's installed).

Run that and (assuming your code runs for a second or more) you will get a profile in a webview.

[jmfontana]

Thanks,

It should work as you say but in my case it seems something is amiss. When I try, I get this error message:

Process exited with error code

JM

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Moltes gràcies per l'ajut i per la bona feina, Emery. Aquest profiler és excel·lent. Acabo d'escoltar el podcast Real Python i veig que et podria haver fet la pregunta en català.

[emeryberger]

Graciès, JM! He vist aquest mateix error abans que he pogut resoldre simplement per instal.lant la ultima versió de Scalene (i, potser, si no recordo mal, en canviant la selecció de l'interpreter en l'extensió Python).

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Thanks, JM! I've seen this error before, which I was able to solve by installing the latest version of Scalene, and, if I remember correctly, changing the selected Python interpreter used by the Python extension.