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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 close(self):
 """Close the zip file. Note underlying tempfile is removed when archive is garbage collected. """

        self._closed = True
        self._zip_file.close()
        log.debug(
            "Created custodian serverless archive size: %0.2fmb",
            (os.path.getsize(self._temp_archive_file.name) / (
                1024.0 * 1024.0)))
        return self