check_bnb_install.py

import torch

import bitsandbytes as bnb

p = torch.nn.Parameter(torch.rand(10,10).cuda())
a = torch.rand(10,10).cuda()

p1 = p.data.sum().item()

adam = bnb.optim.Adam([p])

out = a*p
loss = out.sum()
loss.backward()
adam.step()

p2 = p.data.sum().item()

assert p1 != p2
print('SUCCESS!')
print('Installation was successful!')