"Item indexing is not supported on wp.array objects" Issue in the user guide

[pswpswpsw]

Environment:

• Python 3.9
• Warp: 1.9.0.dev20250710

On the basics https://nvidia.github.io/warp/basics.html, we have
"Functions can accept arrays and structs as inputs:"

@wp.func
def lookup(foos: wp.array(dtype=wp.uint32), index: int):
    return foos[index]

It gives RuntimeError: Item indexing is not supported on wp.array objects

This implies that this part of user guide needs to be updated?

[shi-eric]

Hi Professor Pan, nice to hear from you again. I guess you're trying to call this function directly from the Python scope instead of from a kernel?

@christophercrouzet maybe we should update the docs to be more clear about the caveats against this, like an cross-reference to the "Python Scope vs. Kernel Scope API" section and mentioning this case.

[pswpswpsw]

@shi-eric thank you Eric! Good to see you as well! Yes. I was trying to call this from the python directly.

Perhaps the code block can have a differerent color for those from kernel api, say background orange?

[shi-eric]

We'll consider it. For now, we added some clarifications to https://nvidia.github.io/warp/basics.html#user-functions