old_contents: from pyscf.ci.cisd import CISD
  
new_contents: from pyscf.ci import cisd
  		
  def CISD(mf, frozen=[], mo_coeff=None, mo_occ=None):		
      from pyscf import scf		
      if isinstance(mf, (scf.uhf.UHF, scf.rohf.ROHF)):		
          raise NotImplementedError('RO-CISD, UCISD are not available in this pyscf version')		
      return cisd.CISD(mf, frozen, mo_coeff, mo_occ)		
  
subject: Revert accidental changes to ci