qiskit.utils.QuantumInstance.maybe_refresh_cals_matrix¶ QuantumInstance.maybe_refresh_cals_matrix(timestamp=None)[source]¶ Calculate the time difference from the query of last time. প্যারামিটার timestamp (Optional[float]) -- timestamp রিটার্ন টাইপ bool রিটার্নস Whether or not refresh the cals_matrix