title: Set up cassandra driver (python) in Docker
body: <p>I used a docker file several months ago that (1) uses base ubuntu image, (2) installs miniconda python distribution, (3) installs some python libraries using miniconda, (4) runs following commands to set up cassandra-driver for python.</p>
  
  <pre><code>RUN pip install --upgrade pip
  RUN pip install cassandra-driver
  </code></pre>
  
  <p>This worked perfectly six months ago. But now I'm getting this exception. </p>
  
  <pre><code>Step 13 : RUN pip install cassandra-driver
   ---&gt; Running in ba9955650d7c
  Collecting cassandra-driver
    Downloading cassandra-driver-3.0.0.tar.gz (186kB)
      Complete output from command python setup.py egg_info:
      warning: no files found matching '*.pyx' under directory 'Cython/Debugger/Tests'
      warning: no files found matching '*.pxd' under directory 'Cython/Debugger/Tests'
      warning: no files found matching '*.h' under directory 'Cython/Debugger/Tests'
      warning: no files found matching '*.pxd' under directory 'Cython/Utility'
      unable to execute 'gcc': No such file or directory
      Unable to find pgen, not compiling formal grammar.
      Traceback (most recent call last):
        File "&lt;string&gt;", line 20, in &lt;module&gt;
        File "/tmp/pip-build-0XzsPv/cassandra-driver/setup.py", line 375, in &lt;module&gt;
          run_setup(None)
        File "/tmp/pip-build-0XzsPv/cassandra-driver/setup.py", line 373, in run_setup
          **kw)
        File "/miniconda/lib/python2.7/distutils/core.py", line 111, in setup
          _setup_distribution = dist = klass(attrs)
        File "/miniconda/lib/python2.7/site-packages/setuptools-19.1.1-py2.7.egg/setuptools/dist.py", line 268, in __init__
        File "/miniconda/lib/python2.7/site-packages/setuptools-19.1.1-py2.7.egg/setuptools/dist.py", line 312, in fetch_build_eggs
        File "/miniconda/lib/python2.7/site-packages/setuptools-19.1.1-py2.7.egg/pkg_resources/__init__.py", line 846, in resolve
        File "/miniconda/lib/python2.7/site-packages/setuptools-19.1.1-py2.7.egg/pkg_resources/__init__.py", line 1091, in best_match
        File "/miniconda/lib/python2.7/site-packages/setuptools-19.1.1-py2.7.egg/pkg_resources/__init__.py", line 1103, in obtain
        File "/miniconda/lib/python2.7/site-packages/setuptools-19.1.1-py2.7.egg/setuptools/dist.py", line 379, in fetch_build_egg
        File "/miniconda/lib/python2.7/site-packages/setuptools-19.1.1-py2.7.egg/setuptools/command/easy_install.py", line 639, in easy_install
        File "/miniconda/lib/python2.7/site-packages/setuptools-19.1.1-py2.7.egg/setuptools/command/easy_install.py", line 669, in install_item
        File "/miniconda/lib/python2.7/site-packages/setuptools-19.1.1-py2.7.egg/setuptools/command/easy_install.py", line 852, in install_eggs
        File "/miniconda/lib/python2.7/site-packages/setuptools-19.1.1-py2.7.egg/setuptools/command/easy_install.py", line 1080, in build_and_install
        File "/miniconda/lib/python2.7/site-packages/setuptools-19.1.1-py2.7.egg/setuptools/command/easy_install.py", line 1068, in run_setup
      distutils.errors.DistutilsError: Setup script exited with error: command 'gcc' failed with exit status 1
  
      ----------------------------------------
  Command "python setup.py egg_info" failed with error code 1 in /tmp/pip-build-0XzsPv/cassandra-driver
  The command '/bin/sh -c pip install cassandra-driver' returned a non-zero code: 1
  </code></pre>
  
  <p>What might be going wrong? Is the installation package broken or I'm not doing it right?</p>