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

Question

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
  *********************************************************************************
  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

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.

score 167 · Answer 1 · edited Jul 25 '16 at 21:15

167

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

edited Jul 25 '16 at 21:15

Camilo Silva

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answered Mar 08 '16 at 16:12

practual

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Please read through the OPs content. He is doing this on a Windows machine! – Metahuman Mar 10 '16 at 20:31
3

Correct solution for linux when using pip – Goranek Jun 02 '16 at 14:29
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**Fedora 23:** `dnf install libxml2-devel` and `dnf install libxslt-devel` – SergO Jun 22 '16 at 10:40
@Metahuman Installing the same packages with the Cygwin installer solves the problem for me on Windows 10. – Tag Sep 10 '16 at 22:22
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**Centos 7**: ``sudo yum install libxml2-devel libxslt-devel`` (required for python-docx module) – Marc Maxmeister Dec 10 '16 at 17:57

SaeX · Accepted Answer · 2020-07-17T08:46:28.510

138

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

edited Jul 17 '20 at 08:46

answered Nov 18 '15 at 16:49

SaeX

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a not for people having the same problem: 3.4.4. will result in the same error. only version 3.5.0 has gotten me rid of it – user151496 Dec 25 '15 at 00:54
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@user151496 - yum install libxml2-devel libxslt-devel did this for me. http://stackoverflow.com/questions/26884514/why-cant-i-install-lxml-for-python – Trent Jan 15 '16 at 02:32
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The best answer for Windows so far. – Leonel Sanches da Silva Jun 24 '16 at 19:21
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You can also install with this more generic command: pip install --use-wheel --find-links=C:\path\to\folder\with\wheel lxml – rleelr Oct 06 '16 at 14:38
Perfectly installed under Python 2.7 and W10. – m3nda Nov 07 '16 at 23:49
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That link saved my ass lot of times :-) cuz there are lot of wheels in there. – m3nda Jan 27 '17 at 20:49
you should switch to linux – doesnt_matter Apr 03 '17 at 00:41
I have solved my problem installing `libxml2-dev` and `libxslt-dev` in Fedora – Cristhian Boujon Jun 12 '17 at 17:23
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Great help. Another small thing I needed to do: It failed to install on my virtual env (wheel not supported). Eventually I've installed it on my regular python (c:\program files x86...) and copied the `python27\lib\site-packages\lxml*` folders to the virtual env. – reformy Sep 26 '18 at 08:58

score 38 · Answer 3 · answered Dec 23 '15 at 10:35

38

Try to use:
easy_install lxml
That works for me, win10, python 2.7.

answered Dec 23 '15 at 10:35

Zing Lee

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it throws the same error when using easy install command for lxml – Piyush Aug 07 '16 at 04:30
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Used to work for me, but now with a new lxml version this no longer works. – SaeX Aug 08 '16 at 14:52

score 23 · Answer 4 · answered Jan 15 '16 at 17:09

23

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).

answered Jan 15 '16 at 17:09

Jason D

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Yup, that do the trick for me in OS X El Capitan. In fact, if you scrolls up the screen to see the root cause of the error, there is a line there says "Perhaps try: xcode-select --install" – Devy Jan 29 '16 at 22:18
This fixed it, and there is a line that does suggest this as commented above! – jfive Apr 05 '16 at 21:34
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Does anyone else feel like they've run `xcode-select --install` before, though? Is there any introspection on what this does either a first or second time? As a note, though I did not have to install `lxml` globally for it to work in a virtual environment, so at least there is that. – lol Jun 13 '16 at 09:59

score 21 · Answer 5 · edited Jul 25 '16 at 23:28

21

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.

edited Jul 25 '16 at 23:28

suryakrupa

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answered May 26 '16 at 13:24

J1MF0X

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score 10 · Answer 6 · answered Dec 23 '16 at 01:52

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set STATICBUILD=true && pip install lxml

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

https://blogs.msdn.microsoft.com/pythonengineering/2016/04/11/unable-to-find-vcvarsall-bat/

It works for me with Python 3.5.2 and Windows 7

answered Dec 23 '16 at 01:52

BigDav

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i have vc2017 installation, trying your answer. – Banee Ishaque K Jul 16 '18 at 17:49

score 2 · Answer 7 · answered May 03 '18 at 23:37

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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.

answered May 03 '18 at 23:37

gabrieloliveira

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score 1 · Answer 8 · answered Jan 31 '19 at 18:01

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!

score 0 · Answer 9 · answered Mar 21 '20 at 06:22

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

answered Mar 21 '20 at 06:22

Nishara MJ

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score 0 · Answer 10 · answered Oct 31 '21 at 16:25

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I had this issue and realized that while I did have libxml2 installed, I didn't have the necessary development libraries required by the python package.

1) Installing them solved the problem:

The site to download the file: Download

2) After Installing the file save it in a accessible folder

pip install *path to that file*

answered Oct 31 '21 at 16:25

Pranava Amirdan P

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That doesn't seem to include more than the accepted answer. – Robert Oct 31 '21 at 19:28

score -1 · Answer 11 · answered May 27 '21 at 06:23

-1

I am using venv.

In my case it was enough to add lxml==4.6.3 to requirements.txt.

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.

answered May 27 '21 at 06:23

Karol Zlot

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

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