Separate State Preparation from Initialize

qiskit/extensions/__init__.py

@@ -42,13 +42,14 @@
    :toctree: ../stubs/
 
    Initialize
+   StatePreparation
 """
 
 # import all standard gates
 from qiskit.circuit.library.standard_gates import *
 from qiskit.circuit.barrier import Barrier
 
-from .quantum_initializer import Initialize, SingleQubitUnitary
+from .quantum_initializer import Initialize, SingleQubitUnitary, StatePreparation
 from .unitary import UnitaryGate
 from .hamiltonian_gate import HamiltonianGate
 from .simulator import Snapshot

qiskit/extensions/quantum_initializer/__init__.py

@@ -20,3 +20,4 @@
 from .uc import UCGate
 from .isometry import Isometry
 from .initializer import Initialize
+from .state_preparation import StatePreparation