Jetson Nano Developer Kit

I am trying to make a facial recognition system using the Jetson Nano developer kit, I set up my Micro SD card following the Nvidia website and then updated the APT. I created the swapfile to install NUMPY but when I run ‘pip3 install numpy’ it gives me the following error, and i am not sure how to fix it.

pip3 install numpy
Collecting numpy
Using cached https://files.pythonhosted.org/packages/c5/63/a48648ebc57711348420670bb074998f79828291f68aebfff1642be212ec/numpy-1.19.4.zip
Building wheels for collected packages: numpy
Running setup.py bdist_wheel for numpy … error
Complete output from command /usr/bin/python3 -u -c “import setuptools, tokenize;file=’/tmp/pip-build-tk5wbvub/numpy/setup.py’;f=getattr(tokenize, ‘open’, open)(file);code=f.read().replace(’\r\n’, ‘\n’);f.close();exec(compile(code, file, ‘exec’))” bdist_wheel -d /tmp/tmpbf3nxejjpip-wheel- --python-tag cp36:
Running from numpy source directory.
Cythonizing sources
Processing numpy/random/_bounded_integers.pxd.in
Processing numpy/random/_sfc64.pyx
Traceback (most recent call last):
File “/tmp/pip-build-tk5wbvub/numpy/tools/cythonize.py”, line 59, in process_pyx
from Cython.Compiler.Version import version as cython_version
ModuleNotFoundError: No module named ‘Cython’

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File “/tmp/pip-build-tk5wbvub/numpy/tools/cythonize.py”, line 235, in
main()
File “/tmp/pip-build-tk5wbvub/numpy/tools/cythonize.py”, line 231, in main
find_process_files(root_dir)
File “/tmp/pip-build-tk5wbvub/numpy/tools/cythonize.py”, line 222, in find_process_files
process(root_dir, fromfile, tofile, function, hash_db)
File “/tmp/pip-build-tk5wbvub/numpy/tools/cythonize.py”, line 188, in process
processor_function(fromfile, tofile)
File “/tmp/pip-build-tk5wbvub/numpy/tools/cythonize.py”, line 64, in process_pyx
raise OSError(‘Cython needs to be installed in Python as a module’)
OSError: Cython needs to be installed in Python as a module
Traceback (most recent call last):
File “”, line 1, in
File “/tmp/pip-build-tk5wbvub/numpy/setup.py”, line 508, in
setup_package()
File “/tmp/pip-build-tk5wbvub/numpy/setup.py”, line 488, in setup_package
generate_cython()
File “/tmp/pip-build-tk5wbvub/numpy/setup.py”, line 285, in generate_cython
raise RuntimeError(“Running cythonize failed!”)
RuntimeError: Running cythonize failed!


Failed building wheel for numpy
Running setup.py clean for numpy
Complete output from command /usr/bin/python3 -u -c “import setuptools, tokenize;file=’/tmp/pip-build-tk5wbvub/numpy/setup.py’;f=getattr(tokenize, ‘open’, open)(file);code=f.read().replace(’\r\n’, ‘\n’);f.close();exec(compile(code, file, ‘exec’))” clean --all:
Running from numpy source directory.

setup.py clean is not supported, use one of the following instead:

- `git clean -xdf` (cleans all files)
- `git clean -Xdf` (cleans all versioned files, doesn't touch
                    files that aren't checked into the git repo)

Add --force to your command to use it anyway if you must (unsupported).


Failed cleaning build dir for numpy
Failed to build numpy
Installing collected packages: numpy
Running setup.py install for numpy … error
Complete output from command /usr/bin/python3 -u -c “import setuptools, tokenize;file=’/tmp/pip-build-tk5wbvub/numpy/setup.py’;f=getattr(tokenize, ‘open’, open)(file);code=f.read().replace(’\r\n’, ‘\n’);f.close();exec(compile(code, file, ‘exec’))” install --record /tmp/pip-zemw0h9h-record/install-record.txt --single-version-externally-managed --compile --user --prefix=:
Running from numpy source directory.

Note: if you need reliable uninstall behavior, then install
with pip instead of using `setup.py install`:

  - `pip install .`       (from a git repo or downloaded source
                           release)
  - `pip install numpy`   (last NumPy release on PyPi)


Cythonizing sources
numpy/random/_bounded_integers.pxd.in has not changed
Processing numpy/random/_sfc64.pyx
Traceback (most recent call last):
  File "/tmp/pip-build-tk5wbvub/numpy/tools/cythonize.py", line 59, in process_pyx
    from Cython.Compiler.Version import version as cython_version
ModuleNotFoundError: No module named 'Cython'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/tmp/pip-build-tk5wbvub/numpy/tools/cythonize.py", line 235, in <module>
    main()
  File "/tmp/pip-build-tk5wbvub/numpy/tools/cythonize.py", line 231, in main
    find_process_files(root_dir)
  File "/tmp/pip-build-tk5wbvub/numpy/tools/cythonize.py", line 222, in find_process_files
    process(root_dir, fromfile, tofile, function, hash_db)
  File "/tmp/pip-build-tk5wbvub/numpy/tools/cythonize.py", line 188, in process
    processor_function(fromfile, tofile)
  File "/tmp/pip-build-tk5wbvub/numpy/tools/cythonize.py", line 64, in process_pyx
    raise OSError('Cython needs to be installed in Python as a module')
OSError: Cython needs to be installed in Python as a module
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/tmp/pip-build-tk5wbvub/numpy/setup.py", line 508, in <module>
    setup_package()
  File "/tmp/pip-build-tk5wbvub/numpy/setup.py", line 488, in setup_package
    generate_cython()
  File "/tmp/pip-build-tk5wbvub/numpy/setup.py", line 285, in generate_cython
    raise RuntimeError("Running cythonize failed!")
RuntimeError: Running cythonize failed!

----------------------------------------

Command “/usr/bin/python3 -u -c “import setuptools, tokenize;file=’/tmp/pip-build-tk5wbvub/numpy/setup.py’;f=getattr(tokenize, ‘open’, open)(file);code=f.read().replace(’\r\n’, ‘\n’);f.close();exec(compile(code, file, ‘exec’))” install --record /tmp/pip-zemw0h9h-record/install-record.txt --single-version-externally-managed --compile --user --prefix=” failed with error code 1 in /tmp/pip-build-tk5wbvub/numpy/

Moving to Jetson Nano forum for resolution.

Hi,

The error occurs from a missing library.
Please run the below installation command for cython first:

$ pip3 install cython

Thanks.