From the perspective of building quantum computation software based on Qiskit, which approach to defining quantum circuits is more robust?
from qiskit.circuit import QuantumCircuit, QuantumRegister, ClassicalRegister
qr1 = QuantumRegister(3, 'qr1')
qr2 = QuantumRegister(4, 'qr2')
cr = ClassicalRegister(4, 'cr')
circ = QuantumCircuit(qr1, qr2, cr)
OR,
circ = QuantumCircuit(7, 5)
So far I've been using the latter approach, but it seems like I might run into trouble later as the software matures and I add more functionalities. Any opinion from an experienced Quantum Computation Software Developer would be greatly appreciated!