贴下官方的介绍，比较适合用来处理大数据，各种package十分好玩儿，自由切换版本。
＊ 195+ of the most popular Python packages for science, math, engineering, data analysis
＊ Completely free - including for commercial use and even redistribution
Cross platform on Linux, Windows, Mac
＊ Installs into a single directory and doesn't affect other Python installations on your system. Doesn't require root or local administrator privileges
＊ Stay up-to-date by easily updating packages from our free, online repository
＊ Easily switch between Python 2.6, 2.7, 3.3, 3.4, and experiment with multiple versions of libraries, using our conda package manager and its great support for virtual environments
＊ Comes with tools to connect and integrate with Excel
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