avoid serialization of circuit metadata

Qiskit · Feb 28, 2022 · f47fd62 · f47fd62
1 parent b075ec0
commit f47fd62
Showing 1 changed file with 12 additions and 0 deletions.
diff --git a/qiskit/providers/aer/backends/aerbackend.py b/qiskit/providers/aer/backends/aerbackend.py
@@ -288,8 +288,20 @@ def _run(self, qobj, job_id='', format_result=True):
         # Start timer
         start = time.time()
 
+        # Take metadata for JSON serialization
+        metadata_list = []
+        for expr in qobj.experiments:
+            if hasattr(expr.header, 'metadata'):
+                metadata_list.append(expr.header.metadata)
+                del(expr.header.metadata)
+            else:
+                metadata_list.append(None)
+
         # Run simulation
         output = self._execute(qobj)
+        for expr, metadata in zip(qobj.experiments, metadata_list):
+            if metadata:
+                expr.header.metadata = metadata
 
         # Validate output
         if not isinstance(output, dict):