""" Example code for checking connectivity in a layout by using `snarled` and `masque`. """ from pprint import pformat from masque.file import gdsii, oasis import snarled import snarled.interfaces.masque connectivity = { ((1, 0), (1, 2), (2, 0)), #M1 to M2 (via V12) ((1, 0), (1, 3), (3, 0)), #M1 to M3 (via V13) ((2, 0), (2, 3), (3, 0)), #M2 to M3 (via V23) } #cells, props = gdsii.readfile('connectivity.gds') cells, props = oasis.readfile('connectivity.oas') topcell = cells['top'] polys, labels = snarled.interfaces.masque.read_cell(topcell, connectivity) nets_info = snarled.trace_connectivity(polys, labels, connectivity) print('\nFinal nets:') print([kk for kk in sorted(nets_info.nets.keys()) if isinstance(kk.name, str)]) print('\nShorted net sets:') for short in nets_info.get_shorted_nets(): print('(' + ','.join([repr(nn) for nn in sorted(list(short))]) + ')') print('\nOpen nets:') print(pformat(dict(nets_info.get_open_nets())))