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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 _insert_timestamp(self, slug, max_length=255):
 """Appends a timestamp integer to the given slug, yet ensuring the result is less than the specified max_length. """

        timestamp = str(int(time.time()))
        ts_len = len(timestamp) + 1
        while len(slug) + ts_len > max_length:
            slug = '-'.join(slug.split('-')[:-1])
        slug = '-'.join([slug, timestamp])
        return slug