title: How to install scikit-image?
body: <p>Its <a href="http://scikit-image.org/download.html" rel="nofollow noreferrer">scikit-image Download</a> says:</p>
  
  <pre><code>pip install -U scikit-image
  </code></pre>
  
  <p>or</p>
  
  <pre><code>easy_install -U scikit-image
  </code></pre>
  
  <p>but both fail, regardless of the flag U, as shown below:</p>
  
  <pre><code>Georgioss-MacBook-Pro:Downloads gsamaras$ sudo pip install scikit-image
  The directory '/Users/gsamaras/Library/Caches/pip/http' or its parent directory is not owned by the current user and the cache has been disabled. Please check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag.
  The directory '/Users/gsamaras/Library/Caches/pip' or its parent directory is not owned by the current user and caching wheels has been disabled. check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag.
  Collecting scikit-image
    Downloading scikit_image-0.12.3-cp27-cp27m-macosx_10_6_intel.macosx_10_9_intel.macosx_10_9_x86_64.macosx_10_10_intel.macosx_10_10_x86_64.whl (22.2MB)
      100% |████████████████████████████████| 22.2MB 53kB/s 
  Requirement already satisfied: dask[array]&gt;=0.5.0 in /Library/Python/2.7/site-packages (from scikit-image)
  Collecting six&gt;=1.7.3 (from scikit-image)
    Downloading six-1.10.0-py2.py3-none-any.whl
  Collecting networkx&gt;=1.8 (from scikit-image)
    Downloading networkx-1.11-py2.py3-none-any.whl (1.3MB)
      100% |████████████████████████████████| 1.3MB 133kB/s 
  Requirement already satisfied: pillow&gt;=2.1.0 in /Library/Python/2.7/site-packages (from scikit-image)
  Requirement already satisfied: numpy; extra == "array" in /System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python (from dask[array]&gt;=0.5.0-&gt;scikit-image)
  Requirement already satisfied: toolz&gt;=0.7.2; extra == "array" in /Library/Python/2.7/site-packages (from dask[array]&gt;=0.5.0-&gt;scikit-image)
  Collecting decorator&gt;=3.4.0 (from networkx&gt;=1.8-&gt;scikit-image)
    Downloading decorator-4.0.10-py2.py3-none-any.whl
  Installing collected packages: six, decorator, networkx, scikit-image
    Found existing installation: six 1.4.1
      DEPRECATION: Uninstalling a distutils installed project (six) has been deprecated and will be removed in a future version. This is due to the fact that uninstalling a distutils project will only partially uninstall the project.
      Uninstalling six-1.4.1:
  Exception:
  Traceback (most recent call last):
    File "/Library/Python/2.7/site-packages/pip-9.0.1-py2.7.egg/pip/basecommand.py", line 215, in main
      status = self.run(options, args)
    File "/Library/Python/2.7/site-packages/pip-9.0.1-py2.7.egg/pip/commands/install.py", line 342, in run
      prefix=options.prefix_path,
    File "/Library/Python/2.7/site-packages/pip-9.0.1-py2.7.egg/pip/req/req_set.py", line 778, in install
      requirement.uninstall(auto_confirm=True)
    File "/Library/Python/2.7/site-packages/pip-9.0.1-py2.7.egg/pip/req/req_install.py", line 754, in uninstall
      paths_to_remove.remove(auto_confirm)
    File "/Library/Python/2.7/site-packages/pip-9.0.1-py2.7.egg/pip/req/req_uninstall.py", line 115, in remove
      renames(path, new_path)
    File "/Library/Python/2.7/site-packages/pip-9.0.1-py2.7.egg/pip/utils/__init__.py", line 267, in renames
      shutil.move(old, new)
    File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/shutil.py", line 302, in move
      copy2(src, real_dst)
    File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/shutil.py", line 131, in copy2
      copystat(src, dst)
    File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/shutil.py", line 103, in copystat
      os.chflags(dst, st.st_flags)
  OSError: [Errno 1] Operation not permitted: '/tmp/pip-qlMJKP-uninstall/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/six-1.4.1-py2.7.egg-info'
  Georgioss-MacBook-Pro:Downloads gsamaras$ 
  </code></pre>
  
  <p>and:</p>
  
  <pre><code>Georgioss-MacBook-Pro:Downloads gsamaras$ sudo easy_install scikit-image
  Searching for scikit-image
  Reading https://pypi.python.org/simple/scikit-image/
  Best match: scikit-image 0.12.3
  Downloading https://pypi.python.org/packages/86/d0/b0192dc9a544da90f2d9150bcd84b981c6873e42a1f752b6affb89180ad8/scikit-image-0.12.3.tar.gz#md5=04ea833383e0b6ad5f65da21292c25e1
  Processing scikit-image-0.12.3.tar.gz
  Writing /tmp/easy_install-X6Pjoh/scikit-image-0.12.3/setup.cfg
  Running scikit-image-0.12.3/setup.py -q bdist_egg --dist-dir /tmp/easy_install-X6Pjoh/scikit-image-0.12.3/egg-dist-tmp-lHJxkL
  Killed: 9
  </code></pre>
  
  <p>Notice that <code>brew</code> also fails, it cannot find it.</p>
  
  <p>I have Python 2.7.10, Matplotlib 1.3.1, PIL 3.4.2 and Scipy '0.18.1'. What to do?</p>