code: def do_pdb(self, line):
          
          self.from_vim.closeSocket()
          self.pdb = get_hooked_pdb()
          self.pdb.set_trace_without_step(self.botframe)
          if self.has_gone_up():
              self.pdb.update_state(self)
              self.pdb.print_current_stack_entry()
              self.pdb.cmdloop()
          else:
              self.pdb.interaction(self.curframe, None)
          return 1
docs: 'pdb' command:
          switches back to debugging with (almost) standard pdb.Pdb
          except for added 'vim' command.