code: def seek(self, offset, whence = 0):
  		
  		if whence == 0:
  			t = self.current_segment.start_address + offset
  		elif whence == 1:
  			t = self.current_position + offset
  		elif whence == 2:
  			t = self.current_segment.end_address - offset
  		else:
  			raise Exception('Seek function whence value must be between 0-2')
  			
  		if not self.current_segment.inrange(t):
  			raise Exception('Seek would cross memory segment boundaries (use move)')
  		
  		self.current_position = t
  		return
docs: Changes the current address to an offset of offset. The whence parameter controls from which position should we count the offsets.
  		0: beginning of the current memory segment
  		1: from current position
  		2: from the end of the current memory segment
  		If you wish to move out from the segment, use the 'move' function