code: def test_mol_hamiltonian_with_read_structure(tmpdir):
      """Test that the pipeline of using molecular_hamiltonian with
      read_structure executes without errors."""
      f_name = "h2.xyz"
      filename = tmpdir.join(f_name)
  
      with open(filename, "w") as f:
          f.write(file_content)
  
      symbols, coordinates = qchem.read_structure(
          str(filename), outpath=tmpdir
      )
      H, num_qubits = qchem.molecular_hamiltonian(symbols, coordinates)
      assert len(H.terms()) == 2
      assert num_qubits == 4
  
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 5 for calling a global function with example usage: test_mol_hamiltonian_with_read_structure(tmpdir) without return types