modified by an inplace operation error at scalar_quantizer.py

[Suyuanhang]

change levels.unsqueeze_(0) to levels = levels.unsqueeze(0) solve the issue

[shayan113]

@Suyuanhang it doesn't solve the problem for me, which torch and python version do you use?

[LoveDLWujing]

@Suyuanhang it works for me! thanks!