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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 _find_path_required(self, search_dirs, file_name):
 """ Return the path to a template with the given file name. """

        path = self._find_path(search_dirs, file_name)

        if path is None:
            raise TemplateNotFoundError('File %s not found in dirs: %s' %
                                        (repr(file_name), repr(search_dirs)))

        return path