Optional Dependencies
This module defines lazy availability testers for optional third-party dependencies. The checkers are instances of LazyImportTester and can be used as booleans (evaluated lazily), or to raise a MissingOptionalLibraryError when a dependency is required.
Available Testers
HAS_FFSIM
Default value: <qiskit.utils.lazy_tester.LazyImportTester object>
ffsim is a high-performance simulator for fermionic quantum circuits that exploits particle-number and spin-Z conservation.
FermionicCircuit instances can be simulated using ffsim.apply_unitary().
ffsim is an optional dependency because only simulation and the ansatz gates need it.
LazyDependencyManager for usage examples and the available methods of this object.
HAS_PYOMO
Default value: <qiskit.utils.lazy_tester.LazyImportTester object>
Pyomo is a Python-based optimization modeling language used to build linear and mixed-integer programs (LP/MILP) for classical solvers.
LazyDependencyManager for usage examples and the available methods of this object.
HAS_QISKIT_ADDON_SQD
Default value: <qiskit.utils.lazy_tester.LazyImportTester object>
qiskit-addon-sqd implements sample-based quantum diagonalization (SQD): it projects a Hamiltonian onto the subspace spanned by measured computational- basis configurations and iteratively refines that subspace via configuration recovery.
qiskit-addon-sqd is an optional dependency because only the SQD workflows need it.
LazyDependencyManager for usage examples and the available methods of this object.