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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 fpath(self, version=None, tags=None, ext=None):
 """Returns the filepath appropriate for an instance of this dataset. Parameters version: str, optional The version of the instance of this dataset. tags : list of str, optional The tags associated with the given instance of this dataset. ext : str, optional The file extension to use. If not given, the default extension is used. Returns ------- str The appropariate filepath. """

        if self.singleton:
            return dataset_filepath(
                filename=self.fname(version=version, tags=tags, ext=ext),
                task=self.task,
                **self.kwargs,
            )
        return dataset_filepath(
            filename=self.fname(version=version, tags=tags, ext=ext),
            dataset_name=self.name,
            task=self.task,
            **self.kwargs,
        )