Error compiling Cython file

[ubenz55555]

While I'm trying to add one line in /lib/nms/cpy_nms.pyx "print( boxes)"

if boxes[pos, 4] < threshold:
boxes[pos,0] = boxes[N-1, 0]
boxes[pos,1] = boxes[N-1, 1]
boxes[pos,2] = boxes[N-1, 2]
boxes[pos,3] = boxes[N-1, 3]
boxes[pos,4] = boxes[N-1, 4]
N = N - 1
pos = pos - 1
print(boxes)

it comes out an error after I "make" under /lib
test:lib$ make
python setup.py build_ext --inplace
running build_ext
skipping 'utils/bbox.c' Cython extension (up-to-date)
cythoning nms/cpu_nms.pyx to nms/cpu_nms.c
Error compiling Cython file:

...
boxes[pos,2] = boxes[N-1, 2]
boxes[pos,3] = boxes[N-1, 3]
boxes[pos,4] = boxes[N-1, 4]
N = N - 1
pos = pos - 1
print(boxes)
^

nms/cpu_nms.pyx:99:0: Mixed use of tabs and spaces
building 'nms.cpu_nms' extension
x86_64-linux-gnu-gcc -pthread -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -fno-strict-aliasing -Wdate-time -D_FORTIFY_SOURCE=2 -g -fstack-protector-strong -Wformat -Werror=format-security -fPIC -I/usr/lib/python2.7/dist-packages/numpy/core/include -I/usr/include/python2.7 -c nms/cpu_nms.c -o build/temp.linux-x86_64-2.7/nms/cpu_nms.o -Wno-cpp -Wno-unused-function
nms/cpu_nms.c:1:2: error: #error Do not use this file, it is the result of a failed Cython compilation.
#error Do not use this file, it is the result of a failed Cython compilation.
^
error: command 'x86_64-linux-gnu-gcc' failed with exit status 1
Makefile:2: recipe for target 'all' failed
make: *** [all] Error 1

Does anyone have an idea?

[ubenz55555]

It seems not a syntex error， I am unable to compile this cython file after I add one line "print(bbox)"， to show what is in the bbox . This code seems to be unmodifiable.