title: Error while installing Pillow on a Raspberry Pi
body: <p>I just was trying to install yowsup on my new Raspberry Pi. Everything went fine, until it was about to install Pillow. I got the following error message:</p>
  
  <pre><code>Processing dependencies for yowsup2==2.4
  Searching for pillow
  Reading http://pypi.python.org/simple/pillow/
  Best match: Pillow 3.0.0
  Downloading https://pypi.python.org/packages/source/P/Pillow/Pillow-3.0.0.zip#md5=dd81f6cc3f3a5e5fe72f0f1d936339c3
  Processing Pillow-3.0.0.zip
  Running Pillow-3.0.0/setup.py -q bdist_egg --dist-dir /tmp/easy_install-AlZEzs/Pillow-3.0.0/egg-dist-tmp-rX2XN3
  Exception in thread Thread-1 (most likely raised during interpreter shutdown):Exception in thread Thread-2 (most likely raised during interpreter shutdown):
  Traceback (most recent call last):
  
    File "/usr/lib/python2.7/threading.py", line 552, in __bootstrap_innerTraceback (most recent call last):
  
    File "/usr/lib/python2.7/threading.py", line 505, in run  File "/usr/lib/python2.7/threading.py", line 552, in __bootstrap_inner
  
    File "/usr/lib/python2.7/multiprocessing/pool.py", line 353, in _handle_tasks  File "/usr/lib/python2.7/threading.py", line 505, in run
    File "/usr/lib/python2.7/multiprocessing/pool.py", line 329, in _handle_workers
  &lt;type 'exceptions.TypeError'&gt;: 'NoneType' object is not callable
  Exception
  TypeError&lt;type 'exceptions.TypeError'&gt;: 'NoneType' object is not callable
  : TypeError("'NoneType' object does not support item deletion",) in &lt;Finalize object, dead&gt; ignored
  Traceback (most recent call last):
    File "setup.py", line 42, in &lt;module&gt;
      'Topic :: Software Development :: Libraries :: Python Modules'
    File "/usr/lib/python2.7/distutils/core.py", line 152, in setup
      dist.run_commands()
    File "/usr/lib/python2.7/distutils/dist.py", line 953, in run_commands
      self.run_command(cmd)
    File "/usr/lib/python2.7/distutils/dist.py", line 972, in run_command
      cmd_obj.run()
    File "/usr/lib/python2.7/dist-packages/setuptools/command/install.py", line 73, in run
      self.do_egg_install()
    File "/usr/lib/python2.7/dist-packages/setuptools/command/install.py", line 101, in do_egg_install
      cmd.run()
    File "/usr/lib/python2.7/dist-packages/setuptools/command/easy_install.py", line 368, in run
      self.easy_install(spec, not self.no_deps)
    File "/usr/lib/python2.7/dist-packages/setuptools/command/easy_install.py", line 588, in easy_install
      return self.install_item(None, spec, tmpdir, deps, True)
    File "/usr/lib/python2.7/dist-packages/setuptools/command/easy_install.py", line 640, in install_item
      self.process_distribution(spec, dist, deps)
    File "/usr/lib/python2.7/dist-packages/setuptools/command/easy_install.py", line 692, in process_distribution
      [requirement], self.local_index, self.easy_install
    File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 576, in resolve
      dist = best[req.key] = env.best_match(req, self, installer)
    File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 821, in best_match
      return self.obtain(req, installer) # try and download/install
    File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 833, in obtain
      return installer(requirement)
    File "/usr/lib/python2.7/dist-packages/setuptools/command/easy_install.py", line 608, in easy_install
      return self.install_item(spec, dist.location, tmpdir, deps)
    File "/usr/lib/python2.7/dist-packages/setuptools/command/easy_install.py", line 638, in install_item
      dists = self.install_eggs(spec, download, tmpdir)
    File "/usr/lib/python2.7/dist-packages/setuptools/command/easy_install.py", line 828, in install_eggs
      return self.build_and_install(setup_script, setup_base)
    File "/usr/lib/python2.7/dist-packages/setuptools/command/easy_install.py", line 1105, in build_and_install
      self.run_setup(setup_script, setup_base, args)
    File "/usr/lib/python2.7/dist-packages/setuptools/command/easy_install.py", line 1094, in run_setup
      run_setup(setup_script, args)
    File "/usr/lib/python2.7/dist-packages/setuptools/sandbox.py", line 30, in run_setup
      lambda: execfile(
    File "/usr/lib/python2.7/dist-packages/setuptools/sandbox.py", line 72, in run
      return func()
    File "/usr/lib/python2.7/dist-packages/setuptools/sandbox.py", line 32, in &lt;lambda&gt;
      {'__file__':setup_script, '__name__':'__main__'}
    File "setup.py", line 767, in &lt;module&gt;
  
    File "/usr/lib/python2.7/distutils/core.py", line 152, in setup
      dist.run_commands()
    File "/usr/lib/python2.7/distutils/dist.py", line 953, in run_commands
      self.run_command(cmd)
    File "/usr/lib/python2.7/distutils/dist.py", line 972, in run_command
      cmd_obj.run()
    File "/usr/lib/python2.7/dist-packages/setuptools/command/bdist_egg.py", line 179, in run
      cmd = self.call_command('install_lib', warn_dir=0)
    File "/usr/lib/python2.7/dist-packages/setuptools/command/bdist_egg.py", line 166, in call_command
      self.run_command(cmdname)
    File "/usr/lib/python2.7/distutils/cmd.py", line 326, in run_command
      self.distribution.run_command(command)
    File "/usr/lib/python2.7/distutils/dist.py", line 972, in run_command
      cmd_obj.run()
    File "/usr/lib/python2.7/dist-packages/setuptools/command/install_lib.py", line 20, in run
      self.build()
    File "/usr/lib/python2.7/distutils/command/install_lib.py", line 111, in build
      self.run_command('build_ext')
    File "/usr/lib/python2.7/distutils/cmd.py", line 326, in run_command
      self.distribution.run_command(command)
    File "/usr/lib/python2.7/distutils/dist.py", line 972, in run_command
      cmd_obj.run()
    File "/usr/lib/python2.7/distutils/command/build_ext.py", line 339, in run
      self.build_extensions()
    File "setup.py", line 515, in build_extensions
  
  ValueError: --enable-jpeg requested but jpeg not found, aborting.
  </code></pre>
  
  <p>I googeled it for at least an hour, but couldn't find a correct answer. Do you have any suggestions for me?</p>