Question in preprocess_LiTS.py

[findlayr]

Hello,I want to run you code on my computer,and I followed the instruction in README.md.
in the preprocess_LiTS.py file,line of 75 as below:
print('Too little slice，give up the sample:', ct_file)
there was an error like this:
Unresolved reference 'ct_file'

how can i solve the problem?
waiting for your rely
thanks