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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 from_pyfile(self, filename: str, silent: bool=False) -> None: """Load the configuration from a Python cfg or py file. See Python's ConfigParser docs for details on the cfg format. It is a common practice to load the defaults from the source using the :meth:`from_object` and then override with a cfg or py file, for example .. code-block:: python app.config.from_object('config_module') app.config.from_pyfile('production.cfg') Arguments: filename: The filename which when appended to :attr:`root_path` gives the path to the file """

        file_path = self.root_path / filename
        try:
            spec = importlib.util.spec_from_file_location("module.name", file_path)  # type: ignore
            if spec is None:  # Likely passed a cfg file
                parser = ConfigParser()
                parser.optionxform = str  # type: ignore # Prevents lowercasing of keys
                with open(file_path) as file_:
                    config_str = '[section]\n' + file_.read()
                parser.read_string(config_str)
                self.from_mapping(parser['section'])
            else:
                module = importlib.util.module_from_spec(spec)
                spec.loader.exec_module(module)  # type: ignore
                self.from_object(module)
        except (FileNotFoundError, IsADirectoryError):
            if not silent:
                raise