mirror of https://github.com/Qiskit/qiskit.git
18 lines
1.0 KiB
YAML
18 lines
1.0 KiB
YAML
---
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features_circuits:
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- |
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:class:`.CircuitInstruction` and :class:`.DAGOpNode` each have new methods to query various
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properties of their internal :class:`.Operation`, without necessarily needing to access it.
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These methods are:
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* :meth:`.CircuitInstruction.is_standard_gate` and :meth:`.DAGOpNode.is_standard_gate`,
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* :meth:`.CircuitInstruction.is_controlled_gate` and :meth:`.DAGOpNode.is_controlled_gate`,
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* :meth:`.CircuitInstruction.is_directive` and :meth:`.DAGOpNode.is_directive`,
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* :meth:`.CircuitInstruction.is_control_flow` and :meth:`.DAGOpNode.is_control_flow`, and
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* :meth:`.CircuitInstruction.is_parameterized` and :meth:`.DAGOpNode.is_parameterized`.
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If applicable, using any of these methods is significantly faster than querying
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:attr:`.CircuitInstruction.operation` or :attr:`.DAGOpNode.op` directly, especially if the
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instruction or node represents a Qiskit standard gate. This is because the standard gates are
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stored natively in Rust, and their Python representation is only created when requested.
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