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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 slowlog_get(self, length=None):
 """Returns the Redis slow queries log."""

        if length is not None:
            if not isinstance(length, int):
                raise TypeError("length must be int or None")
            return self.execute(b'SLOWLOG', b'GET', length)
        else:
            return self.execute(b'SLOWLOG', b'GET')