Get paremeters entered by a widget

Hello,

After tweaking the parameters, I would like to know if it is possible to get the values back entered in the widget?

I suspect that it is in viewer.window But not sure then in which subsection could be.

Thank you

[tlambert03]

you could connect the widget.changed event to a function that stores your parameters:

from magicgui import magicgui

PARAMS = {}

@magicgui
def func(param1: int, param2: str): ...


@func.changed.connect
def store_params(event):
    widget = event.value
    PARAMS[widget.name] = {
        n: p.default for n, p in widget.__signature__.parameters.items()
    }


func.show(run=True)
# this will only print after you close the widget
print(PARAMS)

you might also be interested in looking through some of the code we did in https://github.com/clEsperanto/napari_pyclesperanto_assistant (which is a similar pipeline of processing using magicgui for input). Basically, the user interactively sets up a chain of processing events using magicgui widgets. Then the task graph can be collected using the to_dask method here … which outputs a dask task graph representing the functions and their arguments…

[tlambert03]

another tip: If you want a dict of parameters like you have in your first example, the magicgui object has a __signature__ attribute that behaves like an inspect signature object that stays up to date:

In [1]: from magicgui import magicgui
   ...:
   ...: @magicgui
   ...: def gaussian(image: int, sigma: float = 1) -> int:
   ...:     ...
   ...:

In [2]: gaussian.sigma.value = 3

In [3]: {k: p.default for k,p in gaussian.__signature__.parameters.items()}
Out[3]: {'image': 0, 'sigma': 3.0}