Following error appear when I try to run MyTest.py

D:\asif\Projects\OtitisNet2\Scripts\python.exe D:\asif\Projects\OtitisNet2\SINet-master\MyTest.py
Traceback (most recent call last):
File "D:\asif\Projects\OtitisNet2\SINet-master\MyTest.py", line 9, in
from Src.utils.trainer import eval_mae, numpy2tensor
File "D:\asif\Projects\OtitisNet2\SINet-master\Src\utils\trainer.py", line 5, in
from apex import amp
ModuleNotFoundError: No module named 'apex'

Process finished with exit code 1

I try to install this using --> pip install apex, but their is no such module. How to fix it?