Return the Pauli group with 4^n elements.
The phases have been removed. case 『weight』 is ordered by Pauli weights and case 『tensor』 is ordered by I,X,Y,Z counting lowest qubit fastest.
number_of_qubits (int) – number of qubits
case (str) – determines ordering of group elements (『weight』 or 『tensor』)
list of Pauli objects
QiskitError – case is not 『weight』 or 『tensor』
QiskitError – number_of_qubits is larger than 4