How to use the minidump.minidumpreader.MinidumpBufferedMemorySegment function in minidump

def _select_segment(self, requested_position):
		"""

		"""
		# check if we have semgnet for requested address in cache
		for memory_segment in self.memory_segments:
			if memory_segment.inrange(requested_position):
				self.current_segment = memory_segment
				self.current_position = requested_position
				return

		# not in cache, check if it's present in memory space. if yes then create a new buffered memeory object, and copy data
		for memory_segment in self.reader.memory_segments:
			if memory_segment.inrange(requested_position):
				newsegment = MinidumpBufferedMemorySegment(memory_segment, self.reader.file_handle)
				self.memory_segments.append(newsegment)
				self.current_segment = newsegment
				self.current_position = requested_position
				return

		raise Exception('Memory address 0x%08x is not in process memory space' % requested_position)