如何安装scikit-image？

Question

其scikit-image Download说：

pip install -U scikit-image 

或

easy_install -U scikit-image 

但都失败，无论标志U，如下图所示：

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]>=0.5.0 in /Library/Python/2.7/site-packages (from scikit-image) 
Collecting six>=1.7.3 (from scikit-image) 
    Downloading six-1.10.0-py2.py3-none-any.whl 
Collecting networkx>=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>=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]>=0.5.0->scikit-image) 
Requirement already satisfied: toolz>=0.7.2; extra == "array" in /Library/Python/2.7/site-packages (from dask[array]>=0.5.0->scikit-image) 
Collecting decorator>=3.4.0 (from networkx>=1.8->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$ 

和：

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 

Notic电子brew也失败，它无法找到它。

我有Python 2.7.10，Matplotlib 1.3.1，PIL 3.4.2和Scipy'0.18.1'。该怎么办？

Answer 1

在您的系统范围的Python上安装库通常是一个坏主意。改为为每个项目使用virtualenv。

首先在Mac上安装virtualenv全球：

$ [sudo] pip install virtualenv 

然后使用virtualenv命令创建一个Python的新（复印件）可执行文件：

$ cd your/prefred/folder 
$ virtualenv your_project 

激活的virtualenv：

$ source your_project/bin/activate 

Y我们的virtualenv被创建并激活（提示符被更改为显示激活）。你可以在其中安装任何东西：

$ pip install -U scikit-image