ValueRrror of SIFID

[Long908]

Thanks to the author for the code, I am getting the following error when running SIFID,can anyone help me?
Traceback（most resent call last）：
File“SIFID/sifid_score.py”,line 258,in
sifid_value = calculate_sifid_given_paths(path1,path2,1,args.gpu!='',64,suffix)
File"SIFID/sifid_score.py",line 245,in calculate_sifid_given_paths
Im_ind.append(int(file_num1[:4]))
ValueRrror:invalid literal for int() with base 10:'birds'