code: def do_eval(self, args):
          
          try:
              res = self._interp.eval(args)
              if res is not None:
                  if hasattr(res, "_pfp__show"):
                      print(res._pfp__show())
                  else:
                      print(repr(res))
          except errors.UnresolvedID as e:
              print("ERROR: " + e.message)
          except Exception as e:
              raise
              print("ERROR: " + e.message)
              
          return False
docs: Eval the user-supplied statement. Note that you can do anything with
          this command that you can do in a template.
  
          The resulting value of your statement will be displayed.