title: DockerSkeleton python ML module installation error
body: <p>I am trying to install python ml modules via dockerSkeleton so i can invoke docker action from openwhisk cli but i am keep getting below errors and couldn't find much help.</p>
  
  <pre><code>  Collecting scikit-learn (from sklearn-&gt;-r requirements.txt (line 4))
      Downloading https://files.pythonhosted.org/packages/25/b6    /454cf208be93efa3db50ce06b732328c57ede005d1dcfa71d9a1548530b0/scikit-learn-0.19.2.tar.gz (9.7MB)
      Building wheels for collected packages: numpy, elm, scipy, sklearn, deap, optunity, scikit-learn
      Running setup.py bdist_wheel for numpy: started
      Running setup.py bdist_wheel for numpy: still running...
    Running setup.py bdist_wheel for numpy: still running...
    Running setup.py bdist_wheel for numpy: still running...
    Running setup.py bdist_wheel for numpy: finished with status 'done'
    Stored in directory: /root/.cache/pip/wheels/29/74/5c/331da973b82cedd300e088ad58bd241c4c8857dd6faf5433eb
    Running setup.py bdist_wheel for elm: started
    Running setup.py bdist_wheel for elm: finished with status 'done'
    Stored in directory: /root/.cache/pip/wheels/31/17/21/20fd245c9d2b1db0e4805d9e3a9b36c2767ce4816378548cf7
    Running setup.py bdist_wheel for scipy: started
    Running setup.py bdist_wheel for scipy: finished with status 'error'
    Complete output from command /usr/local/bin/python -u -c "import setuptools, tokenize;__file__='/tmp/pip-install-jprwp998/scipy/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/pip-wheel-st6v_gb2 --python-tag cp36:
    Traceback (most recent call last):
      File "&lt;string&gt;", line 1, in &lt;module&gt;
      File "/tmp/pip-install-jprwp998/scipy/setup.py", line 474, in &lt;module&gt;
        setup_package()
      File "/tmp/pip-install-jprwp998/scipy/setup.py", line 450, in setup_package
        from numpy.distutils.core import setup
    ModuleNotFoundError: No module named 'numpy'
  
    ----------------------------------------
    Failed building wheel for scipy
    Running setup.py clean for scipy
    Complete output from command /usr/local/bin/python -u -c "import setuptools, tokenize;__file__='/tmp/pip-install-jprwp998/scipy/setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" clean --all:
  
    `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 scipy
    Running setup.py bdist_wheel for sklearn: started
    Running setup.py bdist_wheel for sklearn: finished with status 'done'
    Stored in directory: /root/.cache/pip/wheels/76/03/bb/589d421d27431bcd2c6da284d5f2286c8e3b2ea3cf1594c074
    Running setup.py bdist_wheel for deap: started
    Running setup.py bdist_wheel for deap: finished with status 'done'
    Stored in directory: /root/.cache/pip/wheels/22/ea/bf/dc7c8a2262025a0ab5da9ef02282c198be88902791ca0c6658
    Running setup.py bdist_wheel for optunity: started
    Running setup.py bdist_wheel for optunity: finished with status 'done'
    Stored in directory: /root/.cache/pip/wheels/1c/a1/79/8c2f85ed743981107a5b98afcc95bab74d5f85335ec70c7995
    Running setup.py bdist_wheel for scikit-learn: started
    Running setup.py bdist_wheel for scikit-learn: finished with status 'error'
    Complete output from command /usr/local/bin/python -u -c "import setuptools, tokenize;__file__='/tmp/pip-install-jprwp998/scikit-learn/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/pip-wheel-mhy2zrpk --python-tag cp36:
    Partial import of sklearn during the build process.
    Traceback (most recent call last):
      File "/tmp/pip-install-jprwp998/scikit-learn/setup.py", line 168, in get_numpy_status
        import numpy
    ModuleNotFoundError: No module named 'numpy'
    Traceback (most recent call last):
      File "/tmp/pip-install-jprwp998/scikit-learn/setup.py", line 148, in get_scipy_status
        import scipy
    ModuleNotFoundError: No module named 'scipy'
    Traceback (most recent call last):
      File "&lt;string&gt;", line 1, in &lt;module&gt;
      File "/tmp/pip-install-jprwp998/scikit-learn/setup.py", line 269, in &lt;module&gt;
        setup_package()
      File "/tmp/pip-install-jprwp998/scikit-learn/setup.py", line 249, in setup_package
        .format(numpy_req_str, instructions))
    ImportError: Numerical Python (NumPy) is not installed.
    scikit-learn requires NumPy &gt;= 1.8.2.
    Installation instructions are available on the scikit-learn website: http://scikit-learn.org/stable/install.html
  
  
    ----------------------------------------
    Failed building wheel for scikit-learn
    Running setup.py clean for scikit-learn
  </code></pre>
  
  <p>and the docker file i am using to build this is </p>
  
  <pre><code># Dockerfile for Python whisk docker action
  FROM openwhisk/dockerskeleton
  
  ENV FLASK_PROXY_PORT 8080
  
  
  # lapack-dev is available in community repo.
  RUN echo "http://dl-4.alpinelinux.org/alpine/edge/community" &gt;&gt; /etc/apk/repositories
  
  # add package build dependencies
  RUN apk add --no-cache \
          g++ \
          lapack-dev \
          gfortran
  
  
  # Install our action's Python dependencies
  ADD requirements.txt /action/requirements.txt
  RUN cd /action; pip install -r requirements.txt
  
  # Add all source assets
  ADD . /action
  # Rename our executable Python action
  
  ADD main.py /action/exec
  
  
  CMD ["/bin/bash", "-c", "cd actionProxy &amp;&amp; python -u actionproxy.py"]
  </code></pre>
  
  <p>requirement file is </p>
  
  <pre><code>numpy==1.14.3
  elm
  scipy
  sklearn
  </code></pre>
  
  <p>i have searched alot of websites but nothing is helping, if anyone have any idea or experience with openwhisk docker python actions please any help would be appreciated.</p>
  
  <p><strong>I have checked it by just installing numpy and its working perfectly but somehow when i add scipy and numpy both to install it throws me error that numpy module not found.</strong></p>
  
  <p>Thanks</p>