def METHOD_NAME():
    global mol, auxmol, atm, bas, env
    mol = gto.Mole()
    mol.build(
        verbose = 0,
        atom = '''O     0    0.       0.
                  1     0    -0.757   0.587
                  1     0    0.757    0.587''',
        basis = 'cc-pvdz',
    )
    auxmol = df.addons.make_auxmol(mol, 'weigend')
    atm, bas, env = gto.conc_env(mol._atm, mol._bas, mol._env,
                                 auxmol._atm, auxmol._bas, auxmol._env)