old_contents: # Copyright 2013 Novo Nordisk Foundation Center for Biosustainability,
  # Technical University of Denmark.
  #
  # 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.
  
  import six
  
  from ._version import get_versions
  
  __version__ = get_versions()['version']
  del get_versions
  
  import logging
  
  log = logging.getLogger(__name__)
  
  from .util import list_available_solvers
  
  available_solvers = list_available_solvers()
  
  if available_solvers['GLPK']:
      from .glpk_interface import Model, Variable, Constraint, Objective
  elif available_solvers['CPLEX']:
      from .cplex_interface import Model, Variable, Constraint, Objective
  else:
      log.error('No solvers available.')
  
  if available_solvers['GLPK']:
      if six.PY3:
          from . import glpk_interface
      else:
          import glpk_interface
  if available_solvers['CPLEX']:
      if six.PY3:
          from . import cplex_interface
      else:
          import cplex_interface
  
new_contents: # Copyright 2013 Novo Nordisk Foundation Center for Biosustainability,
  # Technical University of Denmark.
  #
  # 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.
  
  from __future__ import absolute_import
  
  import logging
  from optlang._version import get_versions
  from optlang.util import list_available_solvers
  
  __version__ = get_versions()['version']
  del get_versions
  
  log = logging.getLogger(__name__)
  
  available_solvers = list_available_solvers()
  
  if available_solvers['CPLEX']:
      from optlang.cplex_interface import Model, Variable, Constraint, Objective
  elif available_solvers['GLPK']:
      from optlang.glpk_interface import Model, Variable, Constraint, Objective
  else:
      log.error('No solvers available.')
  
  if available_solvers['GLPK']:
      from optlang import glpk_interface
  if available_solvers['CPLEX']:
      from optlang import cplex_interface
  
subject: make cplex default solver if available