torch.backends.openmp.is_available()
Returns whether PyTorch is built with OpenMP support.
torch.backends.opt_einsum
torch.backends.opt_einsum.is_available()
Returns a bool indicating if opt_einsum is currently available.
Return type:
      bool
torch.backends.opt_einsum.get_opt_einsum()
Returns the opt_einsum package if opt_einsum is currently
   available, else None.
Return type:
      Any
torch.backends.opt_einsum.enabled
A :class:"bool" that controls whether opt_einsum is enabled ("True"
   by default). If so, torch.einsum will use opt_einsum (https
   ://optimized-einsum.readthedocs.io/en/stable/path_finding.html) if
   available to calculate an optimal path of contraction for faster
   performance.
If opt_einsum is not available, torch.einsum will fall back to the
   default contraction path of left to right.
torch.backends.opt_einsum.strategy
A :class:"str" that specifies which strategies to try when