July 2017
Intermediate to advanced
398 pages
11h 54m
Chinese
Content preview from Python数据处理
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94
｜
第
5
章
totals.append(clean(line))
country_line = turn_on_off(line, country_line,
'and areas', previous_line)
total_line = turn_on_off(line, total_line,
'total', previous_line)
previous_line = line
import
pprint
data = dict(zip(countries, totals))
pprint.pprint(data)
有好几种方法可以解决我们面临的问题。在接下来的几节中，我们会讲到其中几种解决
方法。
5.4.1
练习
：
使用表格提取
，
换用另一个库
前面我们对
PDF
转换成文本遇到的困难头痛不已，下面我们寻找其他方法来实现表格提
取，不用
pdfminer
。我们找到了
pdftables
库（
http://pdftables.readthedocs.org/
），这个库已
经不再更新了（原作者的最后一次更新时间是两年多以前）。
我们需要安装必要的库（
http://pdftables.readthedocs.io/en/latest/#installation
），只需运行
pip
install pdftables
和
pip install requests
即可完成安装。原作者并没有及时更新所有的
文档，所以文档和
README.md
中的某些例子明显是错的。尽管如此，我们还是找到了一
个“多合一” ...
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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.
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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.