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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 _region_base(self, region):
 """ Get the base address of a memory region. :param str region: ID of the memory region :return: Address of the memory region :rtype: int """


        if region == 'global':
            region_base_addr = 0
        elif region.startswith('stack_'):
            region_base_addr = self._stack_region_map.absolutize(region, 0)
        else:
            region_base_addr = self._generic_region_map.absolutize(region, 0)

        return region_base_addr