def write_output(self, stdout, results):
        """ Writes results to file.
        :param stdout: Filepath for file.
        :param results: A list of results.
        :return: None.
        """
        try:
            with open(filename, "w") as output:
                for value in results:
                    output_file_write(str(value))
        except:
            print("Error writing the file.")

---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
<ipython-input-24-be93de9f0824> in <module>()
----> 1 au_notebook.write_output('./filtered-by-year.txt', year_results)

TypeError: write_output() missing 1 required positional argument: 'results'

au_notebook.write_output('./filtered-by-year.txt', year_results)