blocks|key|670365|text|由于您尚未提供页面的完整HTML语言，因此目前唯一的选择是使用string.find()或正则表达式。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|670366|但是，找到它的标准方法是使用xpath。请看这个问题：How+to+use+Xpath+in+Python?|offset|length|670367|您可以使用firefox的"inspect+element“功能获取元素的xpath。|670368|对于ex，如果您想要在stackoverflow站点中找到username的XPATH。|670369|670370|打开火狐并登录网站，右键单击用户名(在我的例子中是shadyabhi)并选择Inspect+Element。|unordered-list-item|670371|将鼠标悬停在标签上或右键单击它并“复制xpath”。|670372|670373|​|670374|📷|atomic|670375|670376|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/questions/8692/how-to-use-xpath-in-python|1|IMAGE|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/b91b7f752f311fb495ac8c4c2e06cda7.png|imageAlt^0|0|R|R|0|0|0|0|0|0|0|0|0|0|1|1|0|0^^$0|@$1|2|3|4|5|6|7|1A|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|1B|8|@]|9|@$D|1C|E|1D|1|1E]]|A|$]]|$1|F|3|G|5|6|7|1F|8|@]|9|@]|A|$]]|$1|H|3|I|5|6|7|1G|8|@]|9|@]|A|$]]|$1|J|3|-4|5|6|7|1H|8|@]|9|@]|A|$]]|$1|K|3|L|5|M|7|1I|8|@]|9|@]|A|$]]|$1|N|3|O|5|M|7|1J|8|@]|9|@]|A|$]]|$1|P|3|-4|5|6|7|1K|8|@]|9|@]|A|$]]|$1|Q|3|R|5|6|7|1L|8|@]|9|@]|A|$]]|$1|S|3|T|5|U|7|1M|8|@]|9|@$D|1N|E|1O|1|1P]]|A|$]]|$1|V|3|R|5|6|7|1Q|8|@]|9|@]|A|$]]|$1|W|3|-4|5|6|7|1R|8|@]|9|@]|A|$]]]|X|$Y|$5|Z|10|11|A|$12|13]]|14|$5|15|10|16|A|$17|18|19|-4]]]]

As you have not provided the full HTML of the page, the only option right now is either using string.find() or regular expressions.

But, the standard way of finding this is using xpath. See this question: <a href="https://stackoverflow.com/questions/8692/how-to-use-xpath-in-python">How to use Xpath in Python?</a>

You can obtain the xpath for an element using "inspect element" feature of firefox.

For ex, if you want to find the XPATH for username in stackoverflow site.

<ul>
<li>Open firefox and login to the website &amp; RIght-click on username(shadyabhi in my case) and select Inspect Element.</li>
<li>Keep your mouse over tag or right click it and "Copy xpath".</li>
</ul>

<img src="https://i.stack.imgur.com/ZoiYV.png" alt="enter image description here">

blocks|key|2875952|text|您可以使用解析器提取文档中的任何信息。我建议你使用lxml模块。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|2875953|下面是一个示例：|2875954|from+lxml+import+etree
from+StringIO+import+StringIO

parser+=+etree.HTMLParser()

tree+=+etree.parse(StringIO("""<td+class=h3+align='right'>&nbsp;&nbsp;John+Appleseed</td><td>&nbsp;<a+href="members_myaccount.php"><img+border=0+src="../tbs_v7_0/images/myaccount.gif"+alt="My+Account"></a></td>"""),parser)


>>>+tree.xpath("string()").strip()
u'John+Appleseed'|code-block|syntax|javascript|2875955|有关lxml+here的更多信息|2875956|entityMap|0|LINK|mutability|MUTABLE|url|http://lxml.de/tutorial.html^0|P|4|0|0|0|2|4|7|4|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@$9|X|A|Y|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|Z|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|10|8|@]|D|@]|E|$K|L]]|$1|M|3|N|5|6|7|11|8|@$9|12|A|13|B|C]]|D|@$9|14|A|15|1|16]]|E|$]]|$1|O|3|-4|5|6|7|17|8|@]|D|@]|E|$]]]|P|$Q|$5|R|S|T|E|$U|V]]]]

You can use a parser to extract any information in a document. I suggest you to use <code>lxml</code> module.

Here you have an example:

<pre><code>from lxml import etree
from StringIO import StringIO

parser = etree.HTMLParser()

tree = etree.parse(StringIO("""&lt;td class=h3 align='right'&gt;&amp;nbsp;&amp;nbsp;John Appleseed&lt;/td&gt;&lt;td&gt;&amp;nbsp;&lt;a href="members_myaccount.php"&gt;&lt;img border=0 src="../tbs_v7_0/images/myaccount.gif" alt="My Account"&gt;&lt;/a&gt;&lt;/td&gt;"""),parser)


&gt;&gt;&gt; tree.xpath("string()").strip()
u'John Appleseed'
</code></pre>

More information about <code>lxml</code> <a href="http://lxml.de/tutorial.html" rel="nofollow">here</a>

blocks|key|4491545|text|Mechanize只能用于获取html。一旦您想要从html中提取信息，您可以使用例如BeautifulSoup。(另请参阅我对类似问题的回答：Web+mining+or+scraping+or+crawling?+What+tool/library+should+I+use?)|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|4491546|根据<td>在html中的位置(您的问题不清楚)，您可以使用以下代码：|style|CODE|4491547|html+=+...+#+this+is+the+html+you've+fetched

from+BeautifulSoup+import+BeautifulSoup

soup+=+BeautifulSoup(html)
#+use+this+(gets+all+<td>+elements)
cols+=+soup.findAll('td')
#+or+this+(gets+only+<td>+elements+with+class='h3')
cols+=+soup.findAll('td',+attrs={"class"+:+'h3'})
print+cols[0].renderContents()+#+print+content+of+first+<td>+element|code-block|syntax|javascript|4491548|entityMap|0|LINK|mutability|MUTABLE|url|http://www.crummy.com/software/BeautifulSoup/|1|https://stackoverflow.com/questions/7722876/web-mining-or-scraping-or-crawling-what-tool-library-should-i-use/7722953#7722953^0|17|D|0|20|1V|1|0|2|4|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@$A|X|B|Y|1|Z]|$A|10|B|11|1|12]]|C|$]]|$1|D|3|E|5|6|7|13|8|@$A|14|B|15|F|G]]|9|@]|C|$]]|$1|H|3|I|5|J|7|16|8|@]|9|@]|C|$K|L]]|$1|M|3|-4|5|6|7|17|8|@]|9|@]|C|$]]]|N|$O|$5|P|Q|R|C|$S|T]]|U|$5|P|Q|R|C|$S|V]]]]

Mechanize is only good for fetching the html. Once you want to extract information from the html, you could use for example <a href="http://www.crummy.com/software/BeautifulSoup/" rel="nofollow noreferrer">BeautifulSoup</a>. (See also my answer to a similar question: <a href="https://stackoverflow.com/questions/7722876/web-mining-or-scraping-or-crawling-what-tool-library-should-i-use/7722953#7722953">Web mining or scraping or crawling? What tool/library should I use?</a>)

Depending on where the <code>&lt;td&gt;</code> is located in the html (it's unclear from your question), you could use the following code:

<pre><code>html = ... # this is the html you've fetched

from BeautifulSoup import BeautifulSoup

soup = BeautifulSoup(html)
# use this (gets all &lt;td&gt; elements)
cols = soup.findAll('td')
# or this (gets only &lt;td&gt; elements with class='h3')
cols = soup.findAll('td', attrs={"class" : 'h3'})
print cols[0].renderContents() # print content of first &lt;td&gt; element
</code></pre>

Im making a small python script for auto logon to a website. But i'm stuck.

I'm looking to print into terminal a small part of the html, located within this tag in the html file on the site:

<pre><code>&lt;td class=h3 align='right'&gt;&amp;nbsp;&amp;nbsp;John Appleseed&lt;/td&gt;&lt;td&gt;&amp;nbsp;&lt;a href="members_myaccount.php"&gt;&lt;img border=0 src="../tbs_v7_0/images/myaccount.gif" alt="My Account"&gt;&lt;/a&gt;&lt;/td&gt;
</code></pre>

But how do I extract and print just the name, John Appleseed?

I'm using Pythons' Mechanize on a mac, by the way.

Printing certain HTML Python Mechanize

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我正在制作一个自动登录到网站的小python脚本。但是我被卡住了。我希望将html的一小部分打印到终端中，位于站点上html文件中的以下标记中：<td class=h3 align='right'>&nbsp;&nbsp;John Appleseed</td><td>&nbsp;<a href="members_mya...

问打印某些HTML Python机械化
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