用beautifulsoup提取标签属性

2024-06-16 09:48:18 发布

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我一整天都拿着这个把头发拔出来。基本上我无法从标签中提取信息 比如：

<REUTERS LEWISSPLIT="TRAIN">

我无法获取LEWISSPLIT的值并将其存储在列表中

我有以下代码：

^{pr2}$

解析一些看起来有点像这样的旧路透社XML：

<!DOCTYPE lewis SYSTEM "lewis.dtd">
<REUTERS TOPICS="YES" LEWISSPLIT="TRAIN" CGISPLIT="TRAINING-SET" OLDID="5544" NEWID="1">
<DATE>26-FEB-1987 15:01:01.79</DATE>
<TOPICS><D>cocoa</D></TOPICS>
<PLACES><D>el-salvador</D><D>usa</D><D>uruguay</D></PLACES>
<PEOPLE></PEOPLE>
<ORGS></ORGS>
<EXCHANGES></EXCHANGES>
<COMPANIES></COMPANIES>
<UNKNOWN> 
&#5;&#5;&#5;C T
&#22;&#22;&#1;f0704&#31;reute
u f BC-BAHIA-COCOA-REVIEW   02-26 0105</UNKNOWN>
<TEXT>&#2;
<TITLE>BAHIA COCOA REVIEW</TITLE>
<DATELINE>    SALVADOR, Feb 26 - </DATELINE><BODY>Showers continued throughout the week in
the Bahia cocoa zone, alleviating the drought since early
January and improving prospects for the coming temporao,
although normal humidity levels have not been restored,
Comissaria Smith said in its weekly review.
&#3;</BODY></TEXT>
</REUTERS>
<REUTERS TOPICS="NO" LEWISSPLIT="TRAIN" CGISPLIT="TRAINING-SET" OLDID="5545" NEWID="2">
<DATE>26-FEB-1987 15:02:20.00</DATE>
<TOPICS></TOPICS>
<PLACES><D>usa</D></PLACES>
<PEOPLE></PEOPLE>
<ORGS></ORGS>
<EXCHANGES></EXCHANGES>
<COMPANIES></COMPANIES>
<UNKNOWN> 
&#5;&#5;&#5;F Y
&#22;&#22;&#1;f0708&#31;reute
d f BC-STANDARD-OIL-&lt;SRD>-TO   02-26 0082</UNKNOWN>
<TEXT>&#2;
<TITLE>STANDARD OIL &lt;SRD> TO FORM FINANCIAL UNIT</TITLE>
<DATELINE>    CLEVELAND, Feb 26 - </DATELINE><BODY>Standard Oil Co and BP North America
Inc said they plan to form a venture to manage the money market
borrowing and investment activities of both companies.
    BP North America is a subsidiary of British Petroleum Co
Plc &lt;BP>, which also owns a 55 pct interest in Standard Oil.
    The venture will be called BP/Standard Financial Trading
and will be operated by Standard Oil under the oversight of a
joint management committee.
&#3;</BODY></TEXT>
</REUTERS>
<REUTERS TOPICS="NO" LEWISSPLIT="TRAIN" CGISPLIT="TRAINING-SET" OLDID="5546" NEWID="3">
<DATE>26-FEB-1987 15:03:27.51</DATE>
<TOPICS></TOPICS>
<PLACES><D>usa</D></PLACES>
<PEOPLE></PEOPLE>
<ORGS></ORGS>
<EXCHANGES></EXCHANGES>
<COMPANIES></COMPANIES>
<UNKNOWN> 
&#5;&#5;&#5;F A
&#22;&#22;&#1;f0714&#31;reute
d f BC-TEXAS-COMMERCE-BANCSH   02-26 0064</UNKNOWN>
<TEXT>&#2;
<TITLE>TEXAS COMMERCE BANCSHARES &lt;TCB> FILES PLAN</TITLE>
<DATELINE>    HOUSTON, Feb 26 - </DATELINE><BODY>Texas Commerce Bancshares Inc's Texas
Commerce Bank-Houston said it filed an application with the
Comptroller of the Currency in an effort to create the largest
banking network in Harris County.
    The bank said the network would link 31 banks having
13.5 billion dlrs in assets and 7.5 billion dlrs in deposits.

 Reuter
&#3;</BODY></TEXT>
</REUTERS>

我对删除特殊字符感兴趣，提取body和topic标记的内容并从中构建新的xml：

<topic>oil</topic>
<body>asdsd</body>
<topic>grain</topic>
<body>asdsdds</body>

我想根据LEWISSPLIT的值拆分此数据

我已经能够做到这一切，除了在lewissplit的值上分开。在

这是因为我无法从<reuters>标记提取值。我已经尝试了许多不同的技术从这个网站和官方文件，但当运行

for item in soup.findAll('REUTERS'):
    tags.append(item['LEWISSPLIT'])

print tags[0]

我得到的只是【】

为什么从<REUTERS>标记中提取LEWISSPLIT属性的值如此困难？在

非常感谢你阅读这篇文章。在

另请参见Extracting tag information with beautifulsoup and python


Tags： thetextindatetitlepeopleunknownexchanges
1条回答
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1楼 · 发布于 2024-06-16 09:48:18

乔尔·科内特是对的

“reuters”和“lewissplit”应该是小写的：（正确语法：

for item in soup.findAll('reuters'):
    tags.append(item['lewissplit'])

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