code: def spec(self) -> list:
          
          spec = [item
                  for op, pat in self.ops.items()
                  for item in [('{' + op, {'pat': pat, 'postf': self.postf, 'regex': None}),
                               ('˱' + op, {'pat': pat, 'postf': self.postf, 'regex': None})]
                  ]
          spec[0][1]['regex'] = self.regex_pat.format(_ops_regex(self.ops.keys()))
          return spec
docs: Returns prefix unary operators list.
          Sets only one regex for all items in the dict.