安装和使用 pip

pip 之于 python 犹如 npm 之于 node.js，亦犹如 package control 之于 Sublime Text

不知什么原因 python3.5.2 安装完之后竟然没有 pip，可是在安装向导里面确实有 pip 这个复选框（确认已勾选）。

Warning
Be cautious if you're using a Python install that's managed by your operating system or another package manager. get-pip.py does not coordinate with those tools, and may leave your system in an inconsistent state.

现在我们可以在命令行中使用 pip 了。

通过 pip 安装工具包，使用命令：
pip install xx
pip 卸载工具包的命令是 uninstall：
pip uninstall xx

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使用 pip show xx 显示工具包的相关信息，如下查看 pygments 的相关信息。
另外使用 pip list 来列出已安装包

C:\Users\DELL\Desktop
λ pip show pygments
---
Metadata-Version: 2.0
Name: Pygments
Version: 2.1.3
Summary: Pygments is a syntax highlighting package written in Python.
Home-page: http://pygments.org/
Author: Georg Brandl
Author-email: georg@python.org
Installer: pip
License: BSD License
Location: c:\users\dell\appdata\local\programs\python\python35-32\lib\site-packages
Requires:
Classifiers:
  License :: OSI Approved :: BSD License
  Intended Audience :: Developers
  Intended Audience :: End Users/Desktop
  Intended Audience :: System Administrators
  Development Status :: 6 - Mature
  Programming Language :: Python
  Programming Language :: Python :: 2
  Programming Language :: Python :: 3
  Operating System :: OS Independent
  Topic :: Text Processing :: Filters
  Topic :: Utilities
Entry-points:
  [console_scripts]
  pygmentize = pygments.cmdline:main

如果要对已经安装的工具包进行更新，使用命令 pip install -U xx

pip 更新

我们的 pip 已经是最新的了，无需更新。