code: def circuit_7(a):
      qml.Hadamard(0)
      _ = [qml.RX(qml.math.sin(a), wires=0) for i in range(4)]
      return qml.expval(qml.PauliZ(0))
  
imports: from collections import OrderedDict
  import numpy
  import pytest
  import pennylane
  from pennylane import numpy
  from pennylane.fourier.qnode_spectrum import _process_ids, qnode_spectrum
  from pennylane.measurements import SampleMP, StateMP, VarianceMP
label_desc: Use image node_id 8 for calling a global function with example usage: circuit_7(a) and returns: qml