install issue related to building

[glw]

Im using coco evaluation after training with tensorflow object detection api.
OS: Ubuntu 16
Python3

I saw the issues for installing cocoapi using python3.

• pip3 installed pycocotools
• git cloned repo then, cp -r pycocotools /tensorflow/models/research/
• I was missing tkinter so, apt-get install python3-tk

I now have pycocotools installed under Python3.

running python3 object_detection/eval.py ... still gave me errors.

ImportError: No module named 'pycocotools._mask'

I went back to cocoapi. Assuming I missed something in the installation.

When running python setup command instead of make within the cocoapi/PythonAPI, it does not complete successfully. I get error

python3 setup.py build_ext install

running build_ext
skipping 'pycocotools/_mask.c' Cython extension (up-to-date)
building 'pycocotools._mask' extension
x86_64-linux-gnu-gcc -pthread -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -g -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 -fPIC -I/usr/local/lib/python3.5/dist-packages/numpy/core/include -I../common -I/usr/include/python3.5m -c ../common/maskApi.c -o build/temp.linux-x86_64-3.5/../common/maskApi.o -Wno-cpp -Wno-unused-function -std=c99
unable to execute 'x86_64-linux-gnu-gcc': No such file or directory
error: command 'x86_64-linux-gnu-gcc' failed with exit status 1

And when running

python3 setup.py build_ext --inplace

running build_ext
skipping 'pycocotools/_mask.c' Cython extension (up-to-date)
building 'pycocotools._mask' extension
x86_64-linux-gnu-gcc -pthread -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -g -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 -fPIC -I/usr/local/lib/python3.5/dist-packages/numpy/core/include -I../common -I/usr/include/python3.5m -c ../common/maskApi.c -o build/temp.linux-x86_64-3.5/../common/maskApi.o -Wno-cpp -Wno-unused-function -std=c99
unable to execute 'x86_64-linux-gnu-gcc': No such file or directory
error: command 'x86_64-linux-gnu-gcc' failed with exit status 1

Im not sure where to go from here... Appears to be related to Cython but that is installed at version 0.28.3. I also check to see if gcc is installed just in case and it is.

[glw]

I have fixed the build issue.
First I tried:
apt-get install libssl-dev python3-dev
That didnt suffice. Then,
apt-get install build-essential libffi-dev

Finally,
python3 setup.py build_ext --inplace and python3 setup.py build_ext install worked.

But I am still getting an error when running.

/tensorflow/models/research# python3 object_detection/eval.py --logtostderr --pipeline_config_path=/home/obj_det/all_images/train/ssdlite_mobilenet_v2_coco.config --checkpoint_dir=/home/obj_det/all_images/train/ --eval_dir=/home/obj_det/eval

Traceback (most recent call last):
  File "object_detection/eval.py", line 50, in <module>
    from object_detection import evaluator
  File "/tensorflow/models/research/object_detection/evaluator.py", line 24, in <module>
    from object_detection import eval_util
  File "/tensorflow/models/research/object_detection/eval_util.py", line 28, in <module>
    from object_detection.metrics import coco_evaluation
  File "/tensorflow/models/research/object_detection/metrics/coco_evaluation.py", line 20, in <module>
    from object_detection.metrics import coco_tools
  File "/tensorflow/models/research/object_detection/metrics/coco_tools.py", line 47, in <module>
    from pycocotools import coco
  File "/tensorflow/models/research/pycocotools/coco.py", line 55, in <module>
    from . import mask as maskUtils
  File "/tensorflow/models/research/pycocotools/mask.py", line 3, in <module>
    import pycocotools._mask as _mask
ImportError: No module named 'pycocotools._mask'

[salihkaragoz]

Which python version do you use ? Python3.6 or python3.5
Try these
python3 -m pip install cython
python3 -m pip install pycocotools

Or

pip3 install cython
pip3 install pycocotools

[glw]

@salihkaragoz Im using 3.5.2

Just tried the installs you suggested, and its telling me the requirement is already satisfied for both.

[zacharymostowsky]

@glw any development on this issue? Having similar difficulties on uBuntu 16.04 python 2.7.

[eniolasonowo]

install gcc and g++ all their dependencies then run pip3 install pycocotools or python3 -m pip install pycocotools , but make sure u install cython first.

[cojerman]

for me using python3
pip3 install cython
then 'make' in coco/cocoapi/PythonAPI
followed by sudo python setup.py install solved the problem