blocks|key|4452685|text|从http://www.lfd.uci.edu/~gohlke/pythonlibs/#lxml为您的python版本安装lxml。它是一个带有所需模块/依赖项的预编译WHL。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|4452686|该网站列出了几个包，例如使用Win32+Python3.9时，请使用lxml‑4.5.2‑cp39‑cp39‑win32.whl。|style|CODE|4452687|下载该文件，然后使用以下命令安装：|4452688|pip+install+C:\path\to\downloaded\file\lxml‑4.5.2‑cp39‑cp39‑win32.whl|code-block|syntax|javascript|4452689|entityMap|0|LINK|mutability|MUTABLE|url|http://www.lfd.uci.edu/%257Egohlke/pythonlibs/#lxml^0|1|1B|0|0|Y|U|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@$A|X|B|Y|1|Z]]|C|$]]|$1|D|3|E|5|6|7|10|8|@$A|11|B|12|F|G]]|9|@]|C|$]]|$1|H|3|I|5|6|7|13|8|@]|9|@]|C|$]]|$1|J|3|K|5|L|7|14|8|@]|9|@]|C|$M|N]]|$1|O|3|-4|5|6|7|15|8|@]|9|@]|C|$]]]|P|$Q|$5|R|S|T|C|$U|V]]]]

Install lxml from <a href="http://www.lfd.uci.edu/%7Egohlke/pythonlibs/#lxml" rel="noreferrer">http://www.lfd.uci.edu/~gohlke/pythonlibs/#lxml</a> for your python version. It's a precompiled WHL with required modules/dependencies.
The site lists several packages, when e.g. using Win32 Python 3.9, use <code>lxml‑4.5.2‑cp39‑cp39‑win32.whl</code>.
Download the file, and then install with:
<pre><code>pip install C:\path\to\downloaded\file\lxml‑4.5.2‑cp39‑cp39‑win32.whl
</code></pre>

blocks|key|4452940|text|我遇到了这个问题，并意识到虽然我确实安装了libxml2，但我没有python包所需的必要开发库。安装它们解决了问题：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4452941|sudo+apt-get+install+libxml2-dev+libxslt1-dev
sudo+pip+install+lxml|code-block|syntax|javascript|4452942|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

I had this issue and realised that whilst I did have libxml2 installed, I didn't have the necessary development libraries required by the python package. Installing them solved the problem:

<pre><code>sudo apt-get install libxml2-dev libxslt1-dev
sudo pip install lxml
</code></pre>

blocks|key|4452726|text|尝试使用：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4452727|easy_install+lxml|offset|length|style|CODE|4452728|这对我来说很有效，win10，python2.7。|4452729|entityMap^0|0|0|H|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|M|8|@$D|N|E|O|F|G]]|9|@]|A|$]]|$1|H|3|I|5|6|7|P|8|@]|9|@]|A|$]]|$1|J|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|K|$]]

Try to use: 
<code>easy_install lxml</code> 
That works for me, win10, python 2.7.

blocks|key|4452902|text|在Mac+OS+X+El+Capitan上，我必须运行以下两个命令来修复此错误：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4452903|xcode-select+--install
pip+install+lxml|code-block|syntax|javascript|4452904|最终安装了lxml-3.5.0|4452905|当您运行xcode-select命令时，您可能必须签署一个EULA+(因此，如果您是在一台无头机器上执行此操作，请为UI准备一个X术语)。|4452906|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|P|8|@]|9|@]|A|$]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

On Mac OS X El Capitan I had to run these two commands to fix this error:

<pre><code>xcode-select --install
pip install lxml
</code></pre>

Which ended up installing lxml-3.5.0

When you run the xcode-select command you may have to sign a EULA (so have an X-Term handy for the UI if you're doing this on a headless machine).

blocks|key|4452810|text|set+STATICBUILD=true+&&+pip+install+lxml|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|4452811|请改为运行此命令，必须先安装VS+C%2B%2B编译器|unstyled|4452812|https://blogs.msdn.microsoft.com/pythonengineering/2016/04/11/unable-to-find-vcvarsall-bat/|offset|length|4452813|它适用于我的Python+3.5.2和Windows+7|4452814|entityMap|0|LINK|mutability|MUTABLE|url^0|0|0|0|2J|0|0|0^^$0|@$1|2|3|4|5|6|7|T|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|U|8|@]|9|@]|A|$]]|$1|G|3|H|5|F|7|V|8|@]|9|@$I|W|J|X|1|Y]]|A|$]]|$1|K|3|L|5|F|7|Z|8|@]|9|@]|A|$]]|$1|M|3|-4|5|F|7|10|8|@]|9|@]|A|$]]]|N|$O|$5|P|Q|R|A|$S|H]]]]

<pre><code>set STATICBUILD=true &amp;&amp; pip install lxml
</code></pre>

run this command instead, must have VS C++ compiler installed first

<a href="https://blogs.msdn.microsoft.com/pythonengineering/2016/04/11/unable-to-find-vcvarsall-bat/" rel="noreferrer">https://blogs.msdn.microsoft.com/pythonengineering/2016/04/11/unable-to-find-vcvarsall-bat/</a>

It works for me with Python 3.5.2 and Windows 7

blocks|key|4453004|text|我试着安装了一个依赖于lxml的库，但是什么都不起作用。当构建开始时，我看到一条消息：“构建没有Cython"，所以在使用apt-get+install+cython安装cython之后，安装了lxml。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4453005|entityMap^0|B|4|1P|M|2D|6|2P|4|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]|$9|K|A|L|B|C]|$9|M|A|N|B|C]|$9|O|A|P|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|Q|8|@]|D|@]|E|$]]]|G|$]]

I tried install a lib that depends <code>lxml</code> and nothing works. I see a message when build was started: "Building without Cython", so after install <code>cython</code> with <code>apt-get install cython</code>, <code>lxml</code> was installed.

blocks|key|4453033|text|上面的解决方案都没有出现，这对我来说并不奇怪，但我看到了igd安装如何删除新版本并安装旧版本，对于我下载的解决方案归档文件：https://pypi.org/project/igd/#files|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|4453034|并修改了新版本的推荐版本：'lxml==4.3.0‘in+setup.py+It+works！|4453035|entityMap|0|LINK|mutability|MUTABLE|url|https://pypi.org/project/igd/#files^0|1Q|Z|0|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@$A|O|B|P|1|Q]]|C|$]]|$1|D|3|E|5|6|7|R|8|@]|9|@]|C|$]]|$1|F|3|-4|5|6|7|S|8|@]|9|@]|C|$]]]|G|$H|$5|I|J|K|C|$L|M]]]]

It is not strange for me that none of the solutions above came up, but I saw how the igd installation removed the new version and installed the old one, for the solution I downloaded this archive:<a href="https://pypi.org/project/igd/#files" rel="nofollow noreferrer">https://pypi.org/project/igd/#files</a>

and changed the recommended version of the new version: 'lxml==4.3.0' in setup.py
It works!

blocks|key|4453073|text|对于32位的python，我得到了同样的错误。安装64位后，该问题已修复。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4453074|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

I got the same error for python 32 bit. After install 64bit, the problem was fixed.

blocks|key|4452964|text|我正在使用venv。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4452965|在我的例子中，将lxml==4.6.3添加到requirements.txt中就足够了。|4452966|有一个库想要更早的版本，这导致了这个错误，所以当我强制pip使用最新版本(当前是4.6.3)时，安装成功了。|4452967|entityMap^0|5|4|0|8|B|M|G|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@$9|M|A|N|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|O|8|@$9|P|A|Q|B|C]|$9|R|A|S|B|C]]|D|@]|E|$]]|$1|H|3|I|5|6|7|T|8|@]|D|@]|E|$]]|$1|J|3|-4|5|6|7|U|8|@]|D|@]|E|$]]]|K|$]]

I am using <code>venv</code>.
In my case it was enough to add <code>lxml==4.6.3</code> to <code>requirements.txt</code>.
One library wanted earlier version and this was causing this error, so when I forced pip to use newest version (currently 4.6.3) installation was successful.

I'm getting an error <code>Could not find function xmlCheckVersion in library libxml2. Is libxml2 installed?</code> when trying to install lxml through pip.
<pre><code> c:\users\f\appdata\local\temp\xmlXPathInitqjzysz.c(1) : fatal error C1083: Cannot open include file: 'libxml/xpath.h': No such file or directory
 *********************************************************************************
 Could not find function xmlCheckVersion in library libxml2. Is libxml2 installed?
 *********************************************************************************
 error: command 'C:\\Users\\f\\AppData\\Local\\Programs\\Common\\Microsoft\\Visual C++ for Python\\9.0\\VC\\Bin\\cl.exe' failed with exit status 2
</code></pre>
I don't find any libxml2 dev packages to install via pip.
Using Python 2.7 and Python 3.x on x86 in a virtualenv under Windows 10.

Getting "Could not find function xmlCheckVersion in library libxml2. Is libxml2 installed?" when installing lxml through pip

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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当我试图通过pip安装lxml时，我得到了一个错误的Could not find function xmlCheckVersion in library libxml2. Is libxml2 installed?。  c:\users\f\appdata\local\temp\xmlXPathInitqjzysz.c(1) : fatal error C1083: Cannot open inc

问获取“在库libxml2中找不到函数xmlCheckVersion。是否安装了libxml2？”通过pip安装lxml时
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