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quantumlib · Nov 24, 2021 · ee3b78e · ee3b78e
1 parent fa0345d
commit ee3b78e
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Showing 2 changed files with 5 additions and 5 deletions.
diff --git a/cirq-core/cirq/devices/named_topologies.py b/cirq-core/cirq/devices/named_topologies.py
@@ -20,10 +20,6 @@
 import networkx as nx
 from matplotlib import pyplot as plt
 
-from cirq import _compat
-from cirq.devices import GridQubit, LineQubit
-from cirq.protocols.json_serialization import obj_to_dict_helper
-
 from cirq import _compat
 from cirq.devices import GridQubit, LineQubit
 from cirq.protocols.json_serialization import dataclass_json_dict

diff --git a/cirq-google/cirq_google/workflow/qubit_placement.py b/cirq-google/cirq_google/workflow/qubit_placement.py
@@ -64,8 +64,12 @@ def place_circuit(
     ) -> Tuple['cirq.FrozenCircuit', Dict[Any, 'cirq.Qid']]:
         return circuit.freeze(), {q: q for q in circuit.all_qubits()}
 
+    @classmethod
+    def _json_namespace_(cls) -> str:
+        return 'cirq.google'
+
     def _json_dict_(self) -> Dict[str, Any]:
-        return cirq.dataclass_json_dict(self, namespace='cirq.google')
+        return cirq.dataclass_json_dict(self)
 
     def __repr__(self) -> str:
         return _compat.dataclass_repr(self, namespace='cirq_google')