What is the difference between func and kernel?

[cadop]

Some questions on the difference:

The docs mention

User functions can be called freely from within kernels inside the same module and accept arrays as inputs.

Are these functions that live on the GPU, but are not parallel?

When would someone decide to use a func over a kernel?

Can a func be called outside of a kernel, or is it only callable from a kernel?

A func must be defined in the same module means that they should be in the same file, or in the same total module that contains an __init__.py?

[mmacklin]

The main difference is just that a wp.func() can't be launched from Python, it can only be called from kernels or other functions.

In the latest versions you can call function objects from other Python modules directly. This is not possible with kernels which must be launched from host Python.

Cheers,
Miles