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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_cache(self):
 """Save data to the cache file."""

        # Create the cache directory
        safe_makedirs(self.cache_dir)

        # Create/overwrite the cache file
        try:
            with open(self.cache_file, 'wb') as f:
                pickle.dump(self.data, f)
        except Exception as e:
            logger.error("Cannot write version to cache file {} ({})".format(self.cache_file, e))