code: def distb(self, tb=None, file=None):
          
          if tb is None:
              try:
                  tb = sys.last_traceback
              except AttributeError:
                  raise RuntimeError("no last traceback to disassemble")
              while tb.tb_next: tb = tb.tb_next
          self.disassemble(tb.tb_frame.f_code, tb.tb_lasti, file=file)
docs: Disassemble a traceback (default: last traceback).