class Usecase:
    def __init__(self, file, **settings):
        self.file = file
        self.settings = {"layer": None, "attributes": {}, "material": None}
        for key, value in settings.items():
            self.settings[key] = value

    def execute(self):
        for name, value in self.settings["attributes"].items():
            setattr(self.settings["layer"], name, value)
        self.settings["layer"].Material = self.settings["material"]