releases.py

import ipywidgets as widgets

style = {"description_width": "initial"}

class Releases(widgets.VBox):
    def __init__(self):
        self.particles_per_release = widgets.IntText(
            value=50000,
            description="particles_per_release",
            disabled=False,
            style=style,
        )
        self.mass_per_release = widgets.Text(
            value="1",
            placeholder="mass_per_release",
            description="mass_per_release",
            disabled=False,
            style=style,
        )
        self.list_of_species = widgets.Text(
            value="24",
            placeholder="list_of_species",
            description="list_of_species",
            disabled=False,
            style=style,
        )
        self.children = [
            self.particles_per_release,
            self.mass_per_release,
            self.list_of_species,
        ]
        super().__init__(children=self.children)

    def fill_dict(self):
        return {
            self.particles_per_release.description: self.particles_per_release.value,
            self.mass_per_release.description: self.mass_per_release.value.split(","),
            self.list_of_species.description: self.list_of_species.value.split(","),
        }

    def update(self, dict_):
        for param in self.params:
            param.value = dict_[param.description]