code: def _taper_pauli_sentence(ps_h, generators, paulixops, paulix_sector):
      r"""Transform a PauliSentence with a Clifford operator and then taper qubits.
  
      Args:
          ps_h (~.PauliSentence): The Hamiltonian to be tapered
          generators (list[Operator]): generators expressed as PennyLane Hamiltonians
          paulixops (list[~.PauliX]): list of single-qubit Pauli-X operators
          paulix_sector (list[int]): eigenvalues of the Pauli-X operators.
  
      Returns:
          (Operator): the tapered Hamiltonian
      """
  
      u = clifford(generators, paulixops)
      ps_u = pauli_sentence(u)  # cast to pauli sentence
  
      ts_ps = qml.pauli.PauliSentence()
      for ps in _split_pauli_sentence(
          ps_h, max_size=PAULI_SENTENCE_MEMORY_SPLITTING_SIZE
      ):
          ts_ps += (
              ps_u * ps * ps_u
          )  # helps restrict the peak memory usage for u @ h @ u
  
      wireset = ps_u.wires + ps_h.wires
      wiremap = dict(zip(wireset, range(len(wireset) + 1)))
      paulix_wires = [x.wires[0] for x in paulixops]
  
      o = []
      val = np.ones(len(ts_ps))
  
      wires_tap = [i for i in ts_ps.wires if i not in paulix_wires]
      wiremap_tap = dict(zip(wires_tap, range(len(wires_tap) + 1)))
  
      for i, pw_coeff in enumerate(ts_ps.items()):
          pw, _ = pw_coeff
  
          for idx, w in enumerate(paulix_wires):
              if pw[w] == "X":
                  val[i] *= paulix_sector[idx]
  
          o.append(
              qml.pauli.string_to_pauli_word(
                  "".join([pw[wiremap[i]] for i in wires_tap]),
                  wire_map=wiremap_tap,
              )
          )
  
      c = qml.math.stack(
          qml.math.multiply(val * complex(1.0), list(ts_ps.values()))
      )
  
      tapered_ham = (
          qml.simplify(qml.dot(c, o))
          if active_new_opmath()
          else simplify(qml.Hamiltonian(c, o))
      )
      # If simplified Hamiltonian is missing wires, then add wires manually for consistency
      if set(wires_tap) != tapered_ham.wires.toset():
          identity_op = functools.reduce(
              lambda i, j: i @ j,
              [
                  qml.Identity(wire)
                  for wire in Wires.unique_wires(
                      [tapered_ham.wires, Wires(wires_tap)]
                  )
              ],
          )
  
          if active_new_opmath():
              return tapered_ham + (0.0 * identity_op)
  
          tapered_ham = qml.Hamiltonian(
              np.array([*tapered_ham.coeffs, 0.0]),
              [*tapered_ham.ops, identity_op],
          )
      return tapered_ham
  
imports: import functools
  import itertools
  import numpy
  import scipy
  import pennylane
  from pennylane.operation import active_new_opmath
  from pennylane.pauli import PauliSentence, PauliWord, pauli_sentence, simplify
  from pennylane.pauli.utils import _binary_matrix_from_pws
  from pennylane.wires import Wires
label_desc: Use image node_id 7 for calling a global function with example usage: _taper_pauli_sentence(ps_h, generators, paulixops, paulix_sector) and returns: tapered_ham, unknown