how to get the IoU and mIoU of the test sets?

[shaochengsachin]

After I run "python3 test.py", only the output.txt was obtained. I wanna know how to get the IoU and mIoU of the test sets. Meanwhile, the amounts of the number in the output.txt is significantly less than the amounts of the points in my test sets.
And it is confusing that every time I run test.py, I get a different accuracy result.

[Dali936]

what the output looks like, i get one and i want to know if it is right.