Graph node references?

[apiszcz]

Overview

How do I reference graph nodes with tags?

Expected behavior

Is it possible to reference graph nodes with bracketed labels? Adding the following nodes with self.fchain[-2].link_to(self.fchain[-1]). Am I required to use the proper [-n] index value while adding the nodes?

"filter": [
    ["split[0a][0b]"]
    ["[0a]rotate", "-0.1[aa]"],
    ["[aa][0b]vstack", "inputs=2]

]

Traceback:

    ["split[0a][0b]"]
TypeError: list indices must be integers or slices, not tuple

Investigation