Load a binary quadratic model from a file.
fp (bytes-like/file-like) – If file-like, should be readable, seekable file-like object. If bytes-like it will be wrapped with io.BytesIO.
cls (class, optional) – The class of binary quadratic model. If not provided, the bqm will be of the same class that was saved. Note: currently only works for AdjArrayBQM.
The loaded bqm.