can you tell me the apex version suitable for torch 1.4?

[qq123aa456]

I met a trouble.when I use torch>1.4 I can't sucessful install detectron2 due to subprocess.CalledProcessError: Command '['ninja', '-v']' returned non-zero exit status 1.
but when I use torch 1.4 I successsful install detectron2 but can extract features beacause an error module 'torch.cuda' has no attribute 'amp'.
is there anyone who sucssful extract features? I really need help.

[qq123aa456]

I search the issue they told me amp appear pytorch>1.6 ,which is so bad

[niuzhustc]

I search the issue they told me amp appear pytorch>1.6 ,which is so bad

I use torch 1.5+cu 101+cp36 on 2080ti, and my apex version is 22.04, I use the detectron2 v0.3, maybe you could try this.