Add comment to explain unwraps.

Qiskit · Sep 19, 2024 · 2a0951f · 2a0951f
1 parent 591b0cb
commit 2a0951f
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/crates/circuit/src/operations.rs b/crates/circuit/src/operations.rs
@@ -2123,6 +2123,8 @@ impl Operation for PyInstruction {
             return vec![];
         }
         Python::with_gil(|py| -> Vec<CircuitData> {
+            // We expect that if PyInstruction::control_flow is true then the operation WILL
+            // have a 'blocks' attribute which is a tuple of the Python QuantumCircuit.
             let raw_blocks = self.instruction.getattr(py, "blocks").unwrap();
             let blocks: &Bound<PyTuple> = raw_blocks.downcast_bound::<PyTuple>(py).unwrap();
             blocks