PLEASE NOTE: As of version 0.9.0, released on 2nd April 2021, Qiskit Aqua has been deprecated with its support ending and eventual archival being no sooner than 3 months from that date. The function provided by Qiskit Aqua is not going away rather it has being split out to separate application repositories, with core algorithm and operator function moving to qiskit-terra. Please see the Migration