Method _check_const

Lib/optparse.py:680–684

(self)

                self.dest = self._short_opts[0][1]

    def _check_const(self):
        if self.action not in self.CONST_ACTIONS and self.const is not None:
            raise OptionError(
                "'const' must not be supplied for action %r" % self.action,
                self)

    def _check_nargs(self):
        if self.action in self.TYPED_ACTIONS: