circuit objects and nodes/lines of different circuits are not quivalent.

src/kyupy/circuit.py

@@ -134,10 +134,10 @@ class Node:
 
         This is ok, because (name, kind) is unique within a circuit.
         """
-        return self.name == other.name and self.kind == other.kind
+        return self.name == other.name and self.kind == other.kind and self.circuit == other.circuit
 
     def __hash__(self):
-        return hash((self.name, self.kind))
+        return hash((self.name, self.kind, id(self.circuit)))
 
 
 class Line:
@@ -539,9 +539,6 @@ class Circuit:
         for n in state['io_nodes']:
             self.io_nodes.append(self.nodes[n])
 
-    def __eq__(self, other):
-        return self.nodes == other.nodes and self.lines == other.lines and self.io_nodes == other.io_nodes
-
     def __repr__(self):
         return f'{{name: "{self.name}", cells: {len(self.cells)}, forks: {len(self.forks)}, lines: {len(self.lines)}, io_nodes: {len(self.io_nodes)}}}'
 
@@ -651,9 +648,9 @@ class Circuit:
                 region.append(n)
             yield stem, region
 
-    def dot(self, format='svg'):
+    def dot(self, format='svg', graph_attr={}, line_labels={}):
         from graphviz import Digraph
-        dot = Digraph(format=format, graph_attr={'rankdir': 'LR', 'splines': 'true'})
+        dot = Digraph(format=format, graph_attr={'rankdir': 'LR', 'splines': 'true', 'size': '10', 'ranksep': '0.1'} | graph_attr)
 
         s_dict = dict((n, i) for i, n in enumerate(self.s_nodes))
         node_level = np.zeros(len(self.nodes), dtype=np.uint32)
@@ -666,20 +663,24 @@ class Circuit:
             with dot.subgraph() as s:
                 s.attr(rank='same')
                 for n in level_nodes[lv]:
-                    ins = '|'.join([f'<i{i}>{i}' for i in range(len(n.ins))])
+                    ins = '{' + '|'.join([f'<i{i}>{i}' for i in range(len(n.ins))]) + '}|' if len(n.ins) > 1 else ''
-                    outs = '|'.join([f'<o{i}>{i}' for i in range(len(n.outs))])
+                    outs = '|{' + '|'.join([f'<o{i}>{i}' for i in range(len(n.outs))]) + '}' if len(n.outs) > 1 else ''
                     io = f' [{s_dict[n]}]' if n in s_dict else ''
-                    s.node(name=str(n.index), label = fr'{{{{{ins}}}|{n.index}{io}\n{n.kind}\n{n.name}|{{{outs}}}}}', shape='record')
+                    color = '#f5f5f5' if n.kind == '__fork__' else '#cccccc'
+                    kind = '' if n.kind == '__fork__' else fr'\n{n.kind}'
+                    s.node(name=str(n.index), label = fr'{{{ins}{n.index}{io}{kind}\n{n.name}{outs}}}', shape='record', style='filled', fillcolor=color)
 
         for l in self.lines:
-            driver, reader = f'{l.driver.index}:o{l.driver_pin}', f'{l.reader.index}:i{l.reader_pin}'
+            driver = f'{l.driver.index}:o{l.driver_pin}' if len(l.driver.outs)>1 else f'{l.driver.index}'
+            reader = f'{l.reader.index}:i{l.reader_pin}' if len(l.reader.ins)>1 else f'{l.reader.index}'
+            label = str(line_labels.get(l, l.index))
             if node_level[l.driver] == node_level[l.reader]:
                 s.node(f'_{l.index}_')
-                dot.edge(driver, f'_{l.index}_', style='dotted', label=str(l.index))
+                dot.edge(driver, f'_{l.index}_', style='dotted', label=label)
-                dot.edge(f'_{l.index}_', reader, style='dotted', label=str(l.index))
+                dot.edge(f'_{l.index}_', reader, style='dotted', label=label)
             elif node_level[l.driver] > node_level[l.reader]:
-                dot.edge(driver, reader, style='dotted', label=str(l.index))
+                dot.edge(driver, reader, style='dotted', label=label)
             else:
-                dot.edge(driver, reader, label=str(l.index))
+                dot.edge(driver, reader, label=label)
 
         return dot