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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 save(self):
 """Save subtitle file."""

        try:
            # ensure file is encoded properly while saving
            self.project.main_file.encoding = 'utf_8'
            self.project.save_main()
            if self.fix:
                LOGGER.info("Saved changes to '%s'", self.filename)
        except:  # pylint: disable=W0702
            LOGGER.error("Unable to save '%s'", self.filename)
            sys.exit(1)