old_contents: # Copyright 2021 D-Wave Systems Inc.
  #
  #    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 typing import Hashable, Union
  
  import numpy as np
  
  from dimod.vartypes import VartypeLike
  
  __all__ = ['Bias',
             'Variable',
             'VartypeLike', 'ExtendedVartypeLike',
             ]
  
  
  Variable = Hashable  # todo: exclude None
  Bias = Union[int, float, np.number]
  
  # todo: SamplesLike
  
new_contents: # Copyright 2021 D-Wave Systems Inc.
  #
  #    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.
  
  """
  Type hints for common dimod inputs.
  """
  
  from typing import Hashable, Union
  
  import numpy as np
  
  from dimod.vartypes import VartypeLike
  
  __all__ = ['Bias',
             'Variable',
             'VartypeLike',
             ]
  
  
  Variable = Hashable  # todo: exclude None
  Bias = Union[int, float, np.number]
  
  # todo: SamplesLike
  
subject: Add module docstring for dimod/typing.py