Add ER simulation example using Actions API

[Austin-dev-dot]

Adds an emergency room simulation that demonstrates Mesa's Action system.

Follows up on mesa/mesa#3533, which was closed with the suggestion to submit the example here instead (per @EwoutH).

What it demonstrates:

• Action subclassing with Triage and Treat actions
• Interruptible/resumable treatments for priority scheduling
• Stochastic patient arrivals via schedule_event
• Priority queue where critical patients bump moderate treatments

Files added:

• er_simulation/agents.py - Patient, Doctor agents and Triage, Treat actions
• er_simulation/model.py - ERModel with event-driven arrivals
• tests.py - smoke tests for patient processing, doctor utilization, wait times
• README.md, requirements.txt

[EwoutH]

Thanks for the PR, ER is probably a good use case for this!

Could you:

• Add a screenshot or gif of the visualisation to the PR description
• Request a peer-review (and maybe do one or two yourself)

[ShreyasN707]

This PR looks good to me.

One suggestion: in _on_arrival() the variable nurse refers to a doctor returned by _get_free_doctor(). Renaming it to doctor might improve clarity.

[Austin-dev-dot]

Thanks for the review.Ya ur right renaming the variable would make the intent clear

This PR looks good to me.

One suggestion: in _on_arrival() the variable nurse refers to a doctor returned by _get_free_doctor(). Renaming it to doctor might improve clarity.

Thanks for the review.Ya ur right renaming the variable would make the intent clear

[Austin-dev-dot]

Thanks for the PR, ER is probably a good use case for this!

Could you:

• Add a screenshot or gif of the visualisation to the PR description
• Request a peer-review (and maybe do one or two yourself)

Thank you for reviewing this.I'll update the PR description very soon with a screenshot visualisation
Also yes I’ll also request a peer review and review a couple of other PRs from my side

[EwoutH]

Thanks both for your initial efforts. You’re on the right track.

A review should take place on a deeper level. Basically:

• run the model, play with it, explore interesting behavior. Ask question about that, discuss it and write it down as pointers that users can observe and play with.
• I expect some code-level questions/comments.

The former is more important than the latter.

[ShreyasN707]

@EwoutH sure ! Once I get back I will take a deeper look into the PRs . Thankyou for the guidance.

[Austin-dev-dot]

Thanks both for your initial efforts. You’re on the right track.

A review should take place on a deeper level. Basically:

• run the model, play with it, explore interesting behavior. Ask question about that, discuss it and write it down as pointers that users can observe and play with.

• I expect some code-level questions/comments.

The former is more important than the latter.

definitely I'll
look into it

[ShreyasN707]

I ran the model localy and it works well :

I also tested it with different parameters and it worked well!

@Austin-dev-dot can you improve the Readme.md so that it can be more readable and the startup of the model can be understood easily by other contributors.

[Austin-dev-dot]

heres a ss for visualisation and yes I'll update ther readme file as well

[Harshini2411]

Hey, great work on this! A few things to fix:

• nurse in _on_arrival() still needs to be renamed to doctor
• model.triage_queue_length, model.treatment_queue_length, model.total_interruptions don't exist in model.py that quick start snippet will crash.
• render_visuals.py is referenced in the README but not included in the PR.
• There's no app.py / SolaraViz visualization, most examples in the repo have one. Would be good to add so users can actually interact with the model in a browser.

Overall solid though, especially the README!

[Austin-dev-dot]

Hey, great work on this! A few things to fix:

• nurse in _on_arrival() still needs to be renamed to doctor
• model.triage_queue_length, model.treatment_queue_length, model.total_interruptions don't exist in model.py that quick start snippet will crash.
• render_visuals.py is referenced in the README but not included in the PR.
• There's no app.py / SolaraViz visualization, most examples in the repo have one. Would be good to add so users can actually interact with the model in a browser.

Overall solid though, especially the README!

Thank you so much for the time given to review this
will definitely work on the issues u stated

[Harshini2411]

Happy to help, good luck with it!