parameters.py 文件源码

def _get_var(self, param=None, **kwargs):
        if not isinstance(param, Parameter):
            if isinstance(param, str) and 'twig' not in kwargs.keys():
                kwargs['twig'] = param

            param = self.get_parameter(**kwargs)

        varids = [var.unique_label for var in self._vars]
        if param.uniqueid not in varids:
            raise KeyError("{} was not found in expression".format(param.uniquetwig))
        return self._vars[varids.index(param.uniqueid)]