(self, key)
return self.environment.undefined(name=key)
Looks up a variable like `__getitem__` or `get` but returns an
        :class:`Undefined` object with the name of the name looked up.
Looks up a variable like `__getitem__` or `get` but returns an
        :class:`Undefined` object with the name of the name looked up.
Looks up a variable like __getitem__ or get but returns an : class : Undefined object with the name of the name looked up .
def resolve(self, key):
        """Looks up a variable like `__getitem__` or `get` but returns an
        :class:`Undefined` object with the name of the name looked up.
        """
        if key in self.vars:
            return self.vars[key]
        if key in self.parent:
            return self.parent[key]
        return self.environment.undefined(name=key)
def resolve ( self , key ) : if key in self . vars : return self . vars [ key ] if key in self . parent : return self . parent [ key ] return self . environment . undefined ( name = key )