44 lines
3.4 KiB
Plaintext
44 lines
3.4 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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# DAG Circuits
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<span id="module-qiskit.dagcircuit" />
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`qiskit.dagcircuit`
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## DAG Circuits
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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")(\[nid]) | Parent class for DAGOpNode, DAGInNode, and DAGOutNode. |
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| [`DAGOpNode`](qiskit.dagcircuit.DAGOpNode "qiskit.dagcircuit.DAGOpNode")(op\[, qargs, cargs]) | Object to represent an Instruction at a node in the DAGCircuit. |
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| [`DAGInNode`](qiskit.dagcircuit.DAGInNode "qiskit.dagcircuit.DAGInNode")(wire) | Object to represent an incoming wire node in the DAGCircuit. |
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| [`DAGOutNode`](qiskit.dagcircuit.DAGOutNode "qiskit.dagcircuit.DAGOutNode")(wire) | 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 via operation dependencies (i.e. |
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## Block Collection
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| -------------------------------------------------------------------------------------------- | ------------------------------------------------------------------ |
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| [`BlockCollector`](qiskit.dagcircuit.BlockCollector "qiskit.dagcircuit.BlockCollector")(dag) | Class for implementing block collection on a DAG. |
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| [`BlockCollapser`](qiskit.dagcircuit.BlockCollapser "qiskit.dagcircuit.BlockCollapser")(dag) | Class to consolidate a given block from the dag into a single node |
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## Exceptions
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| ------------------------------------------------------------------------------------------------- | ------------------------------------------------------ |
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| [`DAGCircuitError`](qiskit.dagcircuit.DAGCircuitError "qiskit.dagcircuit.DAGCircuitError")(\*msg) | Base class for errors raised by the DAGCircuit object. |
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