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:UsersPlain>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:usersplainappdatalocal emppip-build-bqakt2scripysetup.py",line 96, in <module>
description=get_description(packages[0], PACKAGE_DIR),
File "c:usersplainappdatalocal emppip-build-bqakt2scripysetup.py",line 47, in get_description
pkg = __import__(package, level=1)
File "c:usersplainappdatalocal emppip-build-bqakt2scripylibscripy\__init__.py", line 11, in <module>
from .edit import *
File "c:usersplainappdatalocal emppip-build-bqakt2scripylibscripyedit.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:usersplainappdatalocal emppip-build-bqakt2scripy
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:UsersPlain>pip install C:UsersPlainDesktopscipy-0.17.1-cp27-cp27m-win_amd64.whl scipy-0.17.1-cp27-cp27m-win_amd64.whl is not a supported wheel on this platform. You are using pip version 7.1.2, however version 8.1.2 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:
1 C:UsersPlain>pip -v 2 3 Usage: 4 pip <command> [options] 5 6 Commands: 7 install Install packages. 8 download Download packages. 9 uninstall Uninstall packages. 10 freeze Output installed packages in requirements format # 输出已安装的软件包的需求格式 11 list List installed packages. # 类似于freeze 12 show Show information about installed packages. 13 search Search PyPI for packages. 14 wheel Build wheels from your requirements. 15 hash Compute hashes of package archives. 16 completion A helper command used for command completion 17 help Show help for commands. 18 19 General Options: 20 -h, --help Show help. 21 --isolated Run pip in an isolated mode, ignoring 22 environment variables and user configuration. 23 -v, --verbose Give more output. Option is additive, and can be 24 used up to 3 times. 25 -V, --version Show version and exit. 26 -q, --quiet Give less output. 27 --log <path> Path to a verbose appending log. 28 --proxy <proxy> Specify a proxy in the form 29 [user:passwd@]proxy.server:port. 30 --retries <retries> Maximum number of retries each connection should 31 attempt (default 5 times). 32 --timeout <sec> Set the socket timeout (default 15 seconds). 33 --exists-action <action> Default action when a path already exists: 34 (s)witch, (i)gnore, (w)ipe, (b)ackup. 35 --trusted-host <hostname> Mark this host as trusted, even though it does 36 not have valid or any HTTPS. 37 --cert <path> Path to alternate CA bundle. 38 --client-cert <path> Path to SSL client certificate, a single file 39 containing the private key and the certificate 40 in PEM format. 41 --cache-dir <dir> Store the cache data in <dir>. 42 --no-cache-dir Disable the cache. 43 --disable-pip-version-check 44 Don't periodically check PyPI to determine 45 whether a new version of pip is available for 46 download. Implied with --no-index. 47 48 C:UsersPlain>pip -V 49 pip 8.1.2 from c:python27libsite-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
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