Cannot run app.py on python 3.12.4

[roccojhu]

Hi there, Thanks for the great work and effort spent putting together this for python, a big help to social science researchers out there. However, I am having some trouble running the app without bugs in my anaconda environment.

I get this error, which makes me suspect that the agents and map aren't even loading.

in Line 141, which runs rect_x = pos[0] + (i * width), I get a TypeError from trying to subscript a NoneType object.

This traces back to line 1707:

ERROR: Component react.component(main.SpaceDrawer) raised exception TypeError("'NoneType' object is not subscriptable")
Traceback (most recent call last):
File "/opt/anaconda3/lib/python3.12/site-packages/reacton/core.py", line 1707, in _render
root_element = el.component.f(*el.args, **el.kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

[Sahil-Chhoker]

I'm not entirely sure what's going on here—@EwoutH, @quaquel, or @tpike3, could one of you take a look at this issue?

[roccojhu]

Hi guys any help here..? Would a screen video be helpful

[quaquel]

From the screenshot, it seems you are running one of the examples from the Mesa examples. These are not entirely up to date so that might be the reason for your problem.

Can you first try the examples that ship with mesa itself?

[roccojhu]

Hi Jan,

Thanks for the quick response.

I have not tried running the main mesa examples because I was looking for an ABM implementation of Hotelling's Law itself for my own research. When I am done in exams in about a week I will definitely have a look at the ones in the main folder.

Actually would you guys be interested in having someone on board get the Hotelling Law's example working? I'm going to try to get it to work.

[quaquel]

I had a quick look at the code. The problem I think is that SpaceDrawer uses agent.pos in various places. This is no longer correct and should be agent.cell.coordinate. One simple solution is most likely to add a property to both agents:

@property
def pos(self):
    return self.cell.coordindate

And of course, a PR fixing this would be very welcome indeed!

[roccojhu]

thanks for the tips, will incorporate your suggestions and see if it works.