snarled/snarl/utils.py

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2022-03-27 23:43:52 -07:00
from typing import Set, Tuple
from .types import connectivity_t, layer_t
def connectivity2layers(
connectivity: connectivity_t,
) -> Tuple[Set[layer_t], Set[layer_t]]:
metal_layers = set()
via_layers = set()
for top, via, bot in connectivity:
metal_layers.add(top)
metal_layers.add(bot)
if via is not None:
via_layers.add(via)
both = metal_layers.intersection(via_layers)
if both:
raise Exception(f'The following layers are both vias and metals!? {both}')
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return metal_layers, via_layers