Error in nosetests, unable to find module

there is a problem using nosetests,

display:
ERROR: Failure: ModuleNotFoundError (No module named "FIGHT.fighting")

the contents of my tests file are as follows:

from nose.tools import *
from FIGHT.fighting import fight

I"ve been looking for why on the Internet for a long time, but I can"t find it.
I suspect there is something wrong with the project framework directory, as shown in the figure.

Jan.10,2022

fighting.py files should be in the FIGHT folder

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