mirror of https://github.com/Qiskit/qiskit.git
19 lines
983 B
YAML
19 lines
983 B
YAML
---
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upgrade:
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- |
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A new requirement has been added to the requirements list,
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`retworkx <https://pypi.org/project/retworkx/>`_. It is an Apache 2.0
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licensed graph library that has a similar API to networkx and is being used
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to significantly speed up the :class:`qiskit.dagcircuit.DAGCircuit`
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operations as part of the transpiler. There are binaries published on PyPI
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for all the platforms supported by Qiskit Terra but if you're using a
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platform where there aren't precompiled binaries published refer to the
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`retworkx documentation
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<https://retworkx.readthedocs.io/en/stable/README.html#installing-retworkx>`_
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for instructions on pip installing from sdist.
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If you encounter any issues with the transpiler or DAGCircuit class as part
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of the transition you can switch back to the previous networkx
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implementation by setting the environment variable ``USE_RETWORKX`` to
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``N``. This option will be removed in the 0.14.0 release.
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