python setuptools安装与psutil模块测试_psutil下载离线包只下载不安装

         Python本身自带了一套工具distutils ，用于发布 Python 应用程序。但 distutils 没有提供定义其它依赖包的功能，setuptools 的真正优点并不在于实现distutils 所能实现的功能——尽管它的确增强了distutils的功能并简化了setup.py 脚本中的内容。setuptools 最大的优势是它在包管理能力方面的增强。它可以使用一种更加透明的方法来查找、下载并安装依赖包；并可以在一个包的多个版本中自由进行切换，这些版本都安装在同一个系统上；也可以声明对某个包的特定版本的需求；还可以只使用一个简单的命令就能更新到某个包的最新版本。
         简单来说，Python setuptools可以看做是增强版的distutils，用来管理Python的各种包。

         一般在CentOS系统安装完成后，Python编译器就已经会安装好了，对于setuptools工具的安装，可以用ea_setup.py脚本的方法，自动下载安装包并安装；也可以先下载完整的setuptools安装包，然后再单独安装。

        一、以ez_setup.py脚本方式安装setuptools工具

         使用ez_setup.py脚本的方法比较简单，但要注意服务器要能够联网下载软件包，安装命令为：
# cd /usr/local/src/
# wget --no-check-certificate https://bootstrap.pypa.io/ez_setup.py
# python ez_setup.py --insecure

         安装的过程为：

# wget --no-check-certificate https://bootstrap.pypa.io/ez_setup.py
--2015-08-27 10:43:48--  https://bootstrap.pypa.io/ez_setup.py
Resolving bootstrap.pypa.io... 103.245.222.175
Connecting to bootstrap.pypa.io|103.245.222.175|:443... connected.
WARNING: certificate common name “*.c.ssl.fastly.net” doesn’t match requested host name “bootstrap.pypa.io”.
HTTP request sent, awaiting response... 200 OK
Length: 11432 (11K) [text/x-python]
Saving to: “ez_setup.py”
 
100%[===================================================================>] 11,432      --.-K/s   in 0s      
 
2015-08-27 10:43:49 (692 MB/s) - “ez_setup.py” saved [11432/11432]
 
#
# python ez_setup.py --insecure
Downloading https://pypi.python.org/packages/source/s/setuptools/setuptools-18.2.zip
Extracting in /tmp/tmpn65Wy1
Now working in /tmp/tmpn65Wy1/setuptools-18.2
Installing Setuptools
running install
running bdist_egg
running egg_info
writing requirements to setuptools.egg-info/requires.txt
writing setuptools.egg-info/PKG-INFO
writing top-level names to setuptools.egg-info/top_level.txt
writing dependency_links to setuptools.egg-info/dependency_links.txt
writing entry points to setuptools.egg-info/entry_points.txt
writing requirements to setuptools.egg-info/requires.txt
writing setuptools.egg-info/PKG-INFO
writing top-level names to setuptools.egg-info/top_level.txt
writing dependency_links to setuptools.egg-info/dependency_links.txt
writing entry points to setuptools.egg-info/entry_points.txt
reading manifest file 'setuptools.egg-info/SOURCES.txt'
reading manifest template 'MANIFEST.in'
writing manifest file 'setuptools.egg-info/SOURCES.txt'
installing library code to build/bdist.linux-x86_64/egg
running install_lib
running build_py
creating build
creating build/lib
copying easy_install.py -> build/lib
creating build/lib/setuptools
copying setuptools/py26compat.py -> build/lib/setuptools
copying setuptools/unicode_utils.py -> build/lib/setuptools
copying setuptools/py31compat.py -> build/lib/setuptools
copying setuptools/windows_support.py -> build/lib/setuptools
copying setuptools/package_index.py -> build/lib/setuptools
copying setuptools/archive_util.py -> build/lib/setuptools
copying setuptools/dist.py -> build/lib/setuptools
copying setuptools/py27compat.py -> build/lib/setuptools
copying setuptools/msvc9_support.py -> build/lib/setuptools
copying setuptools/version.py -> build/lib/setuptools
copying setuptools/compat.py -> build/lib/setuptools
copying setuptools/__init__.py -> build/lib/setuptools
copying setuptools/utils.py -> build/lib/setuptools
copying setuptools/sandbox.py -> build/lib/setuptools
copying setuptools/extension.py -> build/lib/setuptools
copying setuptools/lib2to3_ex.py -> build/lib/setuptools
copying setuptools/depends.py -> build/lib/setuptools
copying setuptools/ssl_support.py -> build/lib/setuptools
copying setuptools/site-patch.py -> build/lib/setuptools
creating build/lib/_markerlib
copying _markerlib/markers.py -> build/lib/_markerlib
copying _markerlib/__init__.py -> build/lib/_markerlib
creating build/lib/pkg_resources
copying pkg_resources/__init__.py -> build/lib/pkg_resources
creating build/lib/setuptools/command
copying setuptools/command/bdist_rpm.py -> build/lib/setuptools/command
copying setuptools/command/develop.py -> build/lib/setuptools/command
copying setuptools/command/build_ext.py -> build/lib/setuptools/command
copying setuptools/command/install.py -> build/lib/setuptools/command
copying setuptools/command/upload_docs.py -> build/lib/setuptools/command
copying setuptools/command/register.py -> build/lib/setuptools/command
copying setuptools/command/build_py.py -> build/lib/setuptools/command
copying setuptools/command/saveopts.py -> build/lib/setuptools/command
copying setuptools/command/alias.py -> build/lib/setuptools/command
copying setuptools/command/install_egg_info.py -> build/lib/setuptools/command
copying setuptools/command/__init__.py -> build/lib/setuptools/command
copying setuptools/command/test.py -> build/lib/setuptools/command
copying setuptools/command/easy_install.py -> build/lib/setuptools/command
copying setuptools/command/rotate.py -> build/lib/setuptools/command
copying setuptools/command/sdist.py -> build/lib/setuptools/command
copying setuptools/command/setopt.py -> build/lib/setuptools/command
copying setuptools/command/egg_info.py -> build/lib/setuptools/command
copying setuptools/command/bdist_egg.py -> build/lib/setuptools/command
copying setuptools/command/install_scripts.py -> build/lib/setuptools/command
copying setuptools/command/install_lib.py -> build/lib/setuptools/command
copying setuptools/command/bdist_wininst.py -> build/lib/setuptools/command
creating build/lib/pkg_resources/_vendor
copying pkg_resources/_vendor/__init__.py -> build/lib/pkg_resources/_vendor
creating build/lib/pkg_resources/_vendor/packaging
copying pkg_resources/_vendor/packaging/_structures.py -> build/lib/pkg_resources/_vendor/packaging
copying pkg_resources/_vendor/packaging/__about__.py -> build/lib/pkg_resources/_vendor/packaging
copying pkg_resources/_vendor/packaging/specifiers.py -> build/lib/pkg_resources/_vendor/packaging
copying pkg_resources/_vendor/packaging/version.py -> build/lib/pkg_resources/_vendor/packaging
copying pkg_resources/_vendor/packaging/__init__.py -> build/lib/pkg_resources/_vendor/packaging
copying pkg_resources/_vendor/packaging/_compat.py -> build/lib/pkg_resources/_vendor/packaging
copying setuptools/script (dev).tmpl -> build/lib/setuptools
copying setuptools/script.tmpl -> build/lib/setuptools
creating build/bdist.linux-x86_64
creating build/bdist.linux-x86_64/egg
creating build/bdist.linux-x86_64/egg/setuptools
copying build/lib/setuptools/py26compat.py -> build/bdist.linux-x86_64/egg/setuptools
creating build/bdist.linux-x86_64/egg/setuptools/command
copying build/lib/setuptools/command/bdist_rpm.py -> build/bdist.linux-x86_64/egg/setuptools/command
copying build/lib/setuptools/command/develop.py -> build/bdist.linux-x86_64/egg/setuptools/command
copying build/lib/setuptools/command/build_ext.py -> build/bdist.linux-x86_64/egg/setuptools/command
copying build/lib/setuptools/command/install.py -> build/bdist.linux-x86_64/egg/setuptools/command
copying build/lib/setuptools/command/upload_docs.py -> build/bdist.linux-x86_64/egg/setuptools/command
copying build/lib/setuptools/command/register.py -> build/bdist.linux-x86_64/egg/setuptools/command
copying build/lib/setuptools/command/build_py.py -> build/bdist.linux-x86_64/egg/setuptools/command
copying build/lib/setuptools/command/saveopts.py -> build/bdist.linux-x86_64/egg/setuptools/command
copying build/lib/setuptools/command/alias.py -> build/bdist.linux-x86_64/egg/setuptools/command
copying build/lib/setuptools/command/install_egg_info.py -> build/bdist.linux-x86_64/egg/setuptools/command
copying build/lib/setuptools/command