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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 default_aux_file_paths(self, primary_path):
 """ Get the default paths for auxiliary files relative to the path of the primary file, i.e. the same name as the primary path with a different extension Parameters primary_path : str Path to the primary file in the fileset Returns ------- aux_paths : dict[str, str] A dictionary of auxiliary file names and default paths """

        return dict((n, primary_path[:-len(self.ext)] + ext)
                    for n, ext in self.aux_files.items())