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fixed for dot-parsed networkx graphs #768

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fixed for dot-parsed networkx graphs #768

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16 changes: 9 additions & 7 deletions dimod/bqm/adjdictbqm.py
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Original file line number Diff line number Diff line change
Expand Up @@ -195,16 +195,18 @@ def _init_components(self, linear, quadratic, offset, vartype):
adj = self._adj

if isinstance(quadratic, abc.Mapping):
for (u, v), bias in quadratic.items():
self.add_variable(u)
self.add_variable(v)
for quadraticitem in quadratic.items():
key = quadraticitem[0]
bias = quadraticitem[1]
self.add_variable(key[0])
self.add_variable(key[1])

if u == v and vartype is Vartype.SPIN:
if key[0] == key[1] and vartype is Vartype.SPIN:
offset = offset + bias # not += on off-chance it's mutable
elif u in adj[v]:
adj[u][v] = adj[v][u] = adj[u][v] + bias
elif key[0] in adj[key[1]]:
adj[key[0]][key[1]] = adj[key[1]][key[0]] = adj[key[0]][key[1]] + bias
else:
adj[u][v] = adj[v][u] = bias
adj[key[0]][key[1]] = adj[key[1]][key[0]] = bias
elif isinstance(quadratic, abc.Iterator):
for u, v, bias in quadratic:
self.add_variable(u)
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