Source code for pyscf.ci.addons

#!/usr/bin/env python
# Copyright 2014-2020 The PySCF Developers. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
# Author: Qiming Sun <osirpt.sun@gmail.com>
#

import numpy as np

[docs] def convert_to_gcisd(myci): from pyscf.ci import gcisd if isinstance(myci, gcisd.GCISD): return myci mf = myci._scf.to_ghf() gci = gcisd.GCISD(mf) assert (myci._nocc is None) assert (myci._nmo is None) gci.__dict__.update(myci.__dict__) gci._scf = mf gci.mo_coeff = mf.mo_coeff gci.mo_occ = mf.mo_occ if isinstance(myci.frozen, (int, np.integer)): gci.frozen = myci.frozen * 2 else: raise NotImplementedError gci.ci = gcisd.from_rcisdvec(myci.ci, myci.nocc, mf.mo_coeff.orbspin) return gci