Method is_undefined

mypy/partially_defined.py:135–138

(self, name: str)

        return name in self.branches[-1].may_be_defined

    def is_undefined(self, name: str) -> bool:
        assert len(self.branches) > 0
        branch = self.branches[-1]
        return name not in branch.may_be_defined and name not in branch.must_be_defined

    def is_defined_in_a_branch(self, name: str) -> bool:
        assert len(self.branches) > 0