move example into a new dir

examples/check.py

@@ -0,0 +1,35 @@
+"""
+Example code for checking connectivity in a layout by using
+`snarl` and `masque`.
+"""
+from pprint import pformat
+
+from masque.file import gdsii, oasis
+
+import snarl
+import snarl.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 = snarl.interfaces.masque.read_cell(topcell, connectivity)
+nets_info = snarl.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())))