code: def interp_head_addr(self):
          
          if self._interp_head_addr is not None:
              return self._interp_head_addr
          try:
              interp_head_addr = self.get_interp_head_addr_through_symbol()
          except SymbolNotFound:
              logger.debug("Could not find interp_head symbol")
              # Hard way
              interp_head_addr = self.get_interp_head_addr_through_PyInterpreterState_Head()
          self._interp_head_addr = interp_head_addr
          return interp_head_addr
docs: Returns PtrTo(PtrTo(PyInterpreterState)) value