安装 SciPy 和 scikit-learn 升级pip 及pip基本命令表

安装Scipy和scikit-learn出错，出错记录及当时最终解决办法

问题:

一、使用pip直接安装

　　直接pip install scipy　　

C:\Users\Plain>pip install scripy
Collecting scripy
  Downloading Scripy-0.9.3.tar.gz
    Complete output from command python setup.py egg_info:Traceback (most recent call last):
      File "<string>", line 1, in <module>
      File "c:\users\plain\appdata\local\temp\pip-build-bqakt2\scripy\setup.py",line 96, in <module>
        description=get_description(packages[0], PACKAGE_DIR),
      File "c:\users\plain\appdata\local\temp\pip-build-bqakt2\scripy\setup.py",line 47, in get_description
        pkg = __import__(package, level=1)
      File "c:\users\plain\appdata\local\temp\pip-build-bqakt2\scripy\lib\scripy\__init__.py", line 11, in <module>
        from .edit import *
      File "c:\users\plain\appdata\local\temp\pip-build-bqakt2\scripy\lib\scripy\edit.py", line 15, in <module>
        import pwd
    ImportError: No module named pwd
    ----------------------------------------
Command "python setup.py egg_info" failed with error code 1 in c:\users\plain\appdata\local\temp\pip-build-bqakt2\scripy\

　　显示错误后，也没有仔细分析问题原因，能力欠缺。

解决：

二、使用.whl文件安装

　　在网站下载scipy.whl 软件http://www.lfd.uci.edu/~gohlke/pythonlibs/#scipy

　　然后在msdos中直接：pip install （将下载好的.whl文件拖入即可）

　　安装失败：显示：　　

C:\Users\Plain>pip install C:\Users\Plain\Desktop\scipy-0.17.-cp27-cp27m-win_amd64.whl
scipy-0.17.-cp27-cp27m-win_amd64.whl is not a supported wheel on this platform.
You are using pip version 7.1., however version 8.1. is available.
You should consider upgrading via the 'python -m pip install --upgrade pip' command.

　　在刚才下载的网上查阅了关于安装有:Use pip version 8 or newer to install the downloaded .whl files.

　　大意就是使用pip version 8 或者最新版本（我的是7.1.2，当时最新8.1.2），可能是pip过旧的原因

解决续：

三，升级pip，及部分pip命令学习

　　按照上边的升级提示:

　　python -m pip install --update pip

　　果然最后显示:Successfully installed pip-8.1.2

　　然后查看pip版本 使用pip -V

　　如果命令出错会显示所有的pip 命令:

　　

 C:\Users\Plain>pip -v

 Usage:
   pip <command> [options]

 Commands:
   install                     Install packages.
   download                    Download packages.
   uninstall                   Uninstall packages.
   freeze                      Output installed packages in requirements format # 输出已安装的软件包的需求格式
   list                        List installed packages.  　　　# 类似于freeze
   show                        Show information about installed packages.
   search                      Search PyPI for packages.
   wheel                       Build wheels from your requirements.
   hash                        Compute hashes of package archives.
   completion                  A helper command used for command completion
   help                        Show help for commands.

 General Options:
   -h, --help                  Show help.
   --isolated                  Run pip in an isolated mode, ignoring
                               environment variables and user configuration.
   -v, --verbose               Give more output. Option is additive, and can be
                               used up to  times.
   -V, --version               Show version and exit.
   -q, --quiet                 Give less output.
   --log <path>                Path to a verbose appending log.
   --proxy <proxy>             Specify a proxy in the form
                               [user:passwd@]proxy.server:port.
   --retries <retries>         Maximum number of retries each connection should
                               attempt (default  times).
   --timeout <sec>             Set the socket timeout (default  seconds).
   --exists-action <action>    Default action when a path already exists:
                               (s)witch, (i)gnore, (w)ipe, (b)ackup.
   --trusted-host <hostname>   Mark this host as trusted, even though it does
                               not have valid or any HTTPS.
   --cert <path>               Path to alternate CA bundle.
   --client-cert <path>        Path to SSL client certificate, a single file
                               containing the private key and the certificate
                               in PEM format.
   --cache-dir <dir>           Store the cache data in <dir>.
   --no-cache-dir              Disable the cache.
   --disable-pip-version-check
                               Don't periodically check PyPI to determine
                               whether a new version of pip is available for
                               download. Implied with --no-index.

 C:\Users\Plain>pip -V
 pip 8.1.2 from c:\python27\lib\site-packages (python 2.7)

四、直接使用pip需要将pip添加到系统环境变量path中

----------------2016-7-24 12:29:40--

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