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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 _is_region_extremely_sparse(self, start, end, base_state=None):
 """ Check whether the given memory region is extremely sparse, i.e., all bytes are the same value. :param int start: The beginning of the region. :param int end: The end of the region. :param base_state: The base state (optional). :return: True if the region is extremely sparse, False otherwise. :rtype: bool """


        all_bytes = None

        if base_state is not None:
            all_bytes = base_state.memory.load(start, end - start + 1)
            try:
                all_bytes = base_state.solver.eval(all_bytes, cast_to=bytes)
            except SimError:
                all_bytes = None

        size = end - start + 1

        if all_bytes is None:
            # load from the binary
            all_bytes = self._fast_memory_load_bytes(start, size)

        if all_bytes is None:
            return True

        if len(all_bytes) < size:
            l.warning("_is_region_extremely_sparse: The given region %#x-%#x is not a continuous memory region in the "
                      "memory space. Only the first %d bytes (%#x-%#x) are processed.", start, end, len(all_bytes),
                      start, start + len(all_bytes) - 1)

        the_byte_value = None
        for b in all_bytes:
            if the_byte_value is None:
                the_byte_value = b
            else:
                if the_byte_value != b:
                    return False

        return True