def parse(self, scope):
self.keyframe, = [<EOL>e[<NUM_LIT:0>] if isinstance(e, tuple) else e for e in self.tokens<EOL>if str(e).strip()<EOL>]<EOL>self.subparse = False<EOL>return self<EOL>
Parse node.
        args:
            scope (Scope): Current scope
        raises:
            SyntaxError
        returns:
            self