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|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|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|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

编译器

Windows

Python

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...

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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