July 2017
Intermediate to advanced
398 pages
11h 54m
Chinese
Content preview from Python数据处理
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处理
Excel
文件
｜
59
Python
库有一个汇总在线目录，叫作
PyPI
（
https://pypi.python.org/pypi
），里面保存了大量
的
Python
包及其元数据和文档。
本章我们要处理的是
Excel
文件。在浏览器中访问
PyPI
网站，你可以搜索与
Excel
相关的
库（搜索结果见
https://pypi.python.org/pypi?:action=search&term=excel&submit=search
）， 搜
索结果中有许多可以下载的
Python
包。这是搜索应该使用哪个
Python
包的一种方法。
从现在开始，我们将使用
pip
来安装
Python
包。安装
pip
（安装方法见
https://pip.pypa.io/
en/latest/installing/#install-pip
）的方法有很多种，你在第
1
章里应该已经安装好了。
首先，要找出
Excel
中的数据值。我们通过安装外部包
xlrd
（
https://pypi.python.org/pypi/
xlrd/0.9.3
）来实现。我们用
pip
安装：
pip install xlrd
运行
uninstall
命令可以卸载这个
Python
包：
pip uninstall xlrd
试一下安装
xlrd
，然后卸载，然后重新安装。掌握
pip
命令是很有用的，因为在本书中和
你的数据处理生涯中都会经常用到这些命令。
有那么多可选的
Python
包，为什么选择
xlrd
呢？选择
Python
库的过程是不完善的。挑选
的方法有许多种。不要试图去找到正确的库。在磨炼自身技能的过程中 ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.