51 lines
3.1 KiB
Plaintext
51 lines
3.1 KiB
Plaintext
---
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title: dagcircuit
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description: API reference for qiskit.dagcircuit
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in_page_toc_min_heading_level: 2
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python_api_type: module
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python_api_name: qiskit.dagcircuit
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---
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<span id="module-qiskit.dagcircuit" />
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<span id="qiskit-dagcircuit" />
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<span id="dag-circuits-qiskit-dagcircuit" />
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# DAG Circuits
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<span id="module-qiskit.dagcircuit" />
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`qiskit.dagcircuit`
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## Circuits as Directed Acyclic Graphs
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| | |
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| ----------------------------------------------------------------------------------------------------------------- | -------------------------------------------------------------------------------------------------------- |
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| [`DAGCircuit`](qiskit.dagcircuit.DAGCircuit "qiskit.dagcircuit.DAGCircuit")() | Quantum circuit as a directed acyclic graph. |
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| [`DAGNode`](qiskit.dagcircuit.DAGNode "qiskit.dagcircuit.DAGNode") | Parent class for DAGOpNode, DAGInNode, and DAGOutNode. |
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| [`DAGOpNode`](qiskit.dagcircuit.DAGOpNode "qiskit.dagcircuit.DAGOpNode") | Object to represent an Instruction at a node in the DAGCircuit. |
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| [`DAGInNode`](qiskit.dagcircuit.DAGInNode "qiskit.dagcircuit.DAGInNode") | Object to represent an incoming wire node in the DAGCircuit. |
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| [`DAGOutNode`](qiskit.dagcircuit.DAGOutNode "qiskit.dagcircuit.DAGOutNode") | Object to represent an outgoing wire node in the DAGCircuit. |
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| [`DAGDepNode`](qiskit.dagcircuit.DAGDepNode "qiskit.dagcircuit.DAGDepNode")(\[type, op, name, qargs, cargs, ...]) | Object to represent the information at a node in the DAGDependency(). |
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| [`DAGDependency`](qiskit.dagcircuit.DAGDependency "qiskit.dagcircuit.DAGDependency")() | Object to represent a quantum circuit as a Directed Acyclic Graph (DAG) via operation dependencies (i.e. |
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## Exceptions
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### DAGCircuitError
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<Class id="qiskit.dagcircuit.DAGCircuitError" github="https://github.com/Qiskit/qiskit/tree/stable/1.2/qiskit/dagcircuit/exceptions.py#L19-L29" signature="qiskit.dagcircuit.DAGCircuitError(*msg)" modifiers="exception">
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Base class for errors raised by the DAGCircuit object.
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Set the error message.
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</Class>
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### DAGDependencyError
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<Class id="qiskit.dagcircuit.DAGDependencyError" github="https://github.com/Qiskit/qiskit/tree/stable/1.2/qiskit/dagcircuit/exceptions.py#L32-L42" signature="qiskit.dagcircuit.DAGDependencyError(*msg)" modifiers="exception">
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Base class for errors raised by the DAGDependency object.
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Set the error message.
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</Class>
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