Method add

nltk/sem/evaluate.py:367–377

Add a new variable-value pair to the assignment, and update ``self.variant``.

(self, var, val)

        return None

    def add(self, var, val):
        """
        Add a new variable-value pair to the assignment, and update
        ``self.variant``.

        """
        assert val in self.domain, f"{val} is not in the domain {self.domain}"
        assert is_indvar(var), "Wrong format for an Individual Variable: '%s'" % var
        self[var] = val
        self._addvariant()
        return self


class Model: