
Check whether the qiskit-nature + PySCF stack is available
Source:R/quantum_nature.R
quantum_nature_available.RdReturns TRUE when (i) reticulate is installed; (ii) the
qiskit core module is importable; (iii) the qiskit_nature
Python module is importable; and (iv) the pyscf Python module
is importable. The function does not execute any electronic-
structure calculation — it is a cheap preflight probe safe to
call from tests and CI.