问题：正在获取“在库libxml2中找不到函数xmlCheckVersion。是否已安装libxml2？” 通过pip安装lxml时
Could not find function xmlCheckVersion in library libxml2. Is libxml2 installed?尝试通过pip安装lxml时出现错误。
c:\users\f\appdata\local\temp\xmlXPathInitqjzysz.c(1) : fatal error C1083: Cannot open include file: 'libxml/xpath.h': No such file or directory
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Could not find function xmlCheckVersion in library libxml2. Is libxml2 installed?
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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
我找不到要通过pip安装的任何libxml2 dev软件包。
在Windows 10下的virtualenv中的x86上使用Python 2.7和Python3.x。
I’m getting an error Could not find function xmlCheckVersion in library libxml2. Is libxml2 installed? when trying to install lxml through pip.
c:\users\f\appdata\local\temp\xmlXPathInitqjzysz.c(1) : fatal error C1083: Cannot open include file: 'libxml/xpath.h': No such file or directory
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Could not find function xmlCheckVersion in library libxml2. Is libxml2 installed?
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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
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.
回答 0
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软件包所需的必要开发库。安装它们解决了问题：
sudo apt-get install libxml2-dev libxslt1-dev
sudo pip install lxml
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:
sudo apt-get install libxml2-dev libxslt1-dev
sudo pip install lxml
回答 1
从http://www.lfd.uci.edu/~gohlke/pythonlibs/#lxml安装适用于您的python版本的lxml 。这是带有所需模块/依赖项的预编译的WHL。
该站点列出了几个软件包，例如，在使用Win32 Python 3.9时，请使用lxml‑4.5.2‑cp39‑cp39‑win32.whl。
下载文件，然后安装：
pip install C:\path\to\downloaded\file\lxml‑4.5.2‑cp39‑cp39‑win32.whl
Install lxml from http://www.lfd.uci.edu/~gohlke/pythonlibs/#lxml 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 lxml‑4.5.2‑cp39‑cp39‑win32.whl.
Download the file, and then install with:
pip install C:\path\to\downloaded\file\lxml‑4.5.2‑cp39‑cp39‑win32.whl
回答 2
尝试使用：
easy_install lxml
这对我有效，win10，python 2.7。
Try to use:
easy_install lxml
That works for me, win10, python 2.7.
回答 3
在Mac OS X El Capitan上，我必须运行以下两个命令来修复此错误：
xcode-select --install
pip install lxml
最终安装了lxml-3.5.0
当您运行xcode-select命令时，您可能必须签署EULA（因此，如果您是在无头计算机上进行操作的，则可以在UI中使用X-Term）。
On Mac OS X El Capitan I had to run these two commands to fix this error:
xcode-select --install
pip install lxml
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).
回答 4
如果其他人有与此相同的问题
Centos，尝试：
yum install python-lxml
的Ubuntu
sudo apt-get install -y python-lxml
为我工作。
In case anyone else has the same issue as this on
Centos, try:
yum install python-lxml
Ubuntu
sudo apt-get install -y python-lxml
worked for me.
回答 5
回答 6
我尝试安装依赖的库，但lxml没有任何效果。我看到，当构建启动的消息：“建而不用Cython”，所以安装后cython使用apt-get install cython，lxml安装。
I tried install a lib that depends lxml and nothing works. I see a message when build was started: “Building without Cython”, so after install cython with apt-get install cython, lxml was installed.
回答 7
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:https://pypi.org/project/igd/#files
and changed the recommended version of the new version: ‘lxml==4.3.0’ in setup.py
It works!
回答 8
对于python 32位，我遇到了相同的错误。安装64位后，此问题已解决。
I got the same error for python 32 bit. After install 64bit, the problem was fixed.
