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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _discover_import(self, prefer=None):
 """ Discovers and imports the best available module from ``packages``. :raises ModuleNotFoundError: If no module is available :return: The name of the module to use :rtype: str """


        available_packages = self.packages
        if isinstance(prefer, str):
            available_packages = (prefer,)

        for module_name in available_packages:
            spec = importlib.util.find_spec(module_name)
            if spec is not None:
                importlib.import_module(module_name)
                imported_hook = getattr(self, f"on_{module_name}_imported", None)
                if callable(imported_hook):
                    imported_hook(sys.modules[module_name])
                return module_name
        raise ModuleNotFoundError(f"no modules in {available_packages!r} found")