One state $\lvert 1\rangle$ implementation using Qiskit. The $\lvert 1\rangle$ state is prepared by applying an X gate to the default $\lvert 0\rangle$.
from qiskit import QuantumCircuit from qiskit.quantum_info import Statevector qc = QuantumCircuit(1) qc.x(0) # |0> -> |1> print(Statevector(qc)) # Statevector([0.+0.j, 1.+0.j], dims=(2,))