Is there any way to run the ptq-quantization without training?

[powk2]

Describe the bug:
As far as I know, most ptq-quantization methods needn't train again but it seems that the current ptq-quantization of nni must run with the training process. It would cost too many time to train again. Is there any way to run the ptq-quantization of nni without training?

Environment:

• NNI version:
• Training service (local|remote|pai|aml|etc):
• Python version:
• PyTorch version:
• Cpu or cuda version:

Reproduce the problem

• Code|Example:

• How to reproduce: