Errors with "controls" argument of @interact

[Keanel-19]

There is multiple errors with the controls argument of @interact.

To use it, the decorated function must have a **kargs argument so it can pass the controls.

@interact(controls=[("b",Button("a"))])
def f(**kargs):
    pass

This code throw an error because it try to pass the proxy to kargs, because it's the first argument of f and doesn't have a default value. But in this case f doesn't take any positional argument :

TypeError: f() takes 0 positional arguments but 1 was given

I can resolve it by adding any argument before **kargs (any control or an argument for the proxy):

@interact(controls=[("b",Button("a"))])
def f(proxy, **kargs):
    pass

In this case, it doesn't throw any error but sagecell add an input control with label kargs

For now I just do this:

@interact(controls=[("b",Button("AA"))])
def f(proxy,**kargs):
    if getattr(proxy,"kargs"):
        del proxy.kargs

[novoselt]

To clarify - is this new behaviour, i.e. things were working for you before, but got broken now, or have you just discovered it? What API are you trying to follow?

[Keanel-19]

I discovered it by following the docstrings in the source file of interacts. I didn't find a better doc.