A warning appears during the running of the program, will this affect the accuracy?

[userhr2333]

Warning: multi_tensor_applier fused unscale kernel is unavailable, possibly because apex was installed without --cuda_ext --cpp_ext. Using Python fallback. Original ImportError was: ModuleNotFoundError("No module named 'amp_C'",)

The version of pytorch I installed is 1.2.0 and the version of torchvision is 0.4.0，and the version of apex is 0.1

[voldemortX]

Your apex installation could be incorrect. Although it is only a warning, I am not sure if this won't affect mix precision training.

[userhr2333]

Thank you, I will try again to reinstall apex