a error with use command "python train.py"

[CharlesDCXX]

hello ,buddy:
I run command "python train.py" at the directory "Image_manipulation_detection-master/train.py",the terminal show the error "File "/tmp/pycharm_project_48/Image_manipulation_detection-master/lib/utils/bbox.py", line 8
cimport cython
^
SyntaxError: invalid syntax
"
I already run "python utils/setup.py install",but i dont know what mean about the line of "cimport cython" in the file of train.py,and why occur the error

[bldu]

try

python setup.py build_ext --inplace