code: def test_real_hamiltonian(
      symbols, geometry, method, args, tmpdir, op_arithmetic
  ):
      r"""Test that the generated Hamiltonian has real coefficients."""
      if op_arithmetic:
          enable_new_opmath()
  
      hamiltonian, _ = qchem.molecular_hamiltonian(
          symbols=symbols,
          coordinates=geometry,
          method=method,
          args=args,
          outpath=tmpdir.strpath,
      )
  
      if op_arithmetic:
          disable_new_opmath()
          h_as_ps = pauli_sentence(hamiltonian)
          assert np.isrealobj(np.array(h_as_ps.values()))
  
      else:
          assert np.isrealobj(hamiltonian.coeffs)
  
file_path: pennylane/tests/qchem/of_tests/test_molecular_hamiltonian.py
imports: import pytest
  from pennylane import Identity, PauliX, PauliY, PauliZ
  from pennylane import numpy
  from pennylane import qchem
  from pennylane.ops import Hamiltonian
  from pennylane.ops.functions import dot
  from pennylane.pauli import pauli_sentence
  from pennylane.operation import enable_new_opmath, disable_new_opmath
label_desc: Use image node_id 7 for calling a global function with example usage: test_real_hamiltonian(symbols, geometry, method, args, tmpdir, op_arithmetic) without return types