code: def catch_warn_ExpvalCost(ansatz, hamiltonian, device, **kwargs):
      """Computes the ExpvalCost and catches the initial deprecation warning."""
  
      with pytest.warns(UserWarning, match="is deprecated,"):
          res = qml.ExpvalCost(ansatz, hamiltonian, device, **kwargs)
      return res
  
imports: import os
  import sys
  import pytest
  import pennylane
  from pennylane import numpy
  from pennylane import qchem
  from pennylane.operation import disable_new_opmath, enable_new_opmath
label_desc: Use image node_id 1 for calling a global function with example usage: catch_warn_ExpvalCost(ansatz, hamiltonian, device) and returns: res