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Installing LXML, facing a "legacy-install-failure" error
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Trying to install lxml on Python 311. Faced with this error.

PS C:\Users\chharlie\Desktop\code> pip install lxml
Collecting lxml
  Using cached lxml-4.9.1.tar.gz (3.4 MB)
  Preparing metadata (setup.py) ... done
Building wheels for collected packages: lxml
  Building wheel for lxml (setup.py) ... error
  error: subprocess-exited-with-error

  × python setup.py bdist_wheel did not run successfully.
  │ exit code: 1
  ╰─> [74 lines of output]
      Building lxml version 4.9.1.
      Building without Cython.
      Building against pre-built libxml2 andl libxslt libraries
      running bdist_wheel
      running build
      running build_py
      creating build
      creating build\lib.win-amd64-cpython-311
      creating build\lib.win-amd64-cpython-311\lxml
      copying src\lxml\builder.py -> build\lib.win-amd64-cpython-311\lxml
      copying src\lxml\cssselect.py -> build\lib.win-amd64-cpython-311\lxml
      copying src\lxml\doctestcompare.py -> build\lib.win-amd64-cpython-311\lxml
      copying src\lxml\ElementInclude.py -> build\lib.win-amd64-cpython-311\lxml
      copying src\lxml\pyclasslookup.py -> build\lib.win-amd64-cpython-311\lxml
      copying src\lxml\sax.py -> build\lib.win-amd64-cpython-311\lxml
      copying src\lxml\usedoctest.py -> build\lib.win-amd64-cpython-311\lxml
      copying src\lxml\_elementpath.py -> build\lib.win-amd64-cpython-311\lxml
      copying src\lxml\__init__.py -> build\lib.win-amd64-cpython-311\lxml
      creating build\lib.win-amd64-cpython-311\lxml\includes
      copying src\lxml\includes\__init__.py -> build\lib.win-amd64-cpython-311\lxml\includes
      creating build\lib.win-amd64-cpython-311\lxml\html
      copying src\lxml\html\builder.py -> build\lib.win-amd64-cpython-311\lxml\html
      copying src\lxml\html\clean.py -> build\lib.win-amd64-cpython-311\lxml\html
      copying src\lxml\html\defs.py -> build\lib.win-amd64-cpython-311\lxml\html
      copying src\lxml\html\diff.py -> build\lib.win-amd64-cpython-311\lxml\html
      copying src\lxml\html\ElementSoup.py -> build\lib.win-amd64-cpython-311\lxml\html
      copying src\lxml\html\formfill.py -> build\lib.win-amd64-cpython-311\lxml\html
      copying src\lxml\html\html5parser.py -> build\lib.win-amd64-cpython-311\lxml\html
      copying src\lxml\html\soupparser.py -> build\lib.win-amd64-cpython-311\lxml\html
      copying src\lxml\html\usedoctest.py -> build\lib.win-amd64-cpython-311\lxml\html
      copying src\lxml\html\_diffcommand.py -> build\lib.win-amd64-cpython-311\lxml\html
      copying src\lxml\html\_html5builder.py -> build\lib.win-amd64-cpython-311\lxml\html
      copying src\lxml\html\_setmixin.py -> build\lib.win-amd64-cpython-311\lxml\html
      copying src\lxml\html\__init__.py -> build\lib.win-amd64-cpython-311\lxml\html
      creating build\lib.win-amd64-cpython-311\lxml\isoschematron
      copying src\lxml\isoschematron\__init__.py -> build\lib.win-amd64-cpython-311\lxml\isoschematron
      copying src\lxml\etree.h -> build\lib.win-amd64-cpython-311\lxml
      copying src\lxml\etree_api.h -> build\lib.win-amd64-cpython-311\lxml
      copying src\lxml\lxml.etree.h -> build\lib.win-amd64-cpython-311\lxml
      copying src\lxml\lxml.etree_api.h -> build\lib.win-amd64-cpython-311\lxml
      copying src\lxml\includes\c14n.pxd -> build\lib.win-amd64-cpython-311\lxml\includes
      copying src\lxml\includes\config.pxd -> build\lib.win-amd64-cpython-311\lxml\includes
      copying src\lxml\includes\dtdvalid.pxd -> build\lib.win-amd64-cpython-311\lxml\includes
      copying src\lxml\includes\etreepublic.pxd -> build\lib.win-amd64-cpython-311\lxml\includes
      copying src\lxml\includes\htmlparser.pxd -> build\lib.win-amd64-cpython-311\lxml\includes
      copying src\lxml\includes\relaxng.pxd -> build\lib.win-amd64-cpython-311\lxml\includes
      copying src\lxml\includes\schematron.pxd -> build\lib.win-amd64-cpython-311\lxml\includes
      copying src\lxml\includes\tree.pxd -> build\lib.win-amd64-cpython-311\lxml\includes
      copying src\lxml\includes\uri.pxd -> build\lib.win-amd64-cpython-311\lxml\includes
      copying src\lxml\includes\xinclude.pxd -> build\lib.win-amd64-cpython-311\lxml\includes
      copying src\lxml\includes\xmlerror.pxd -> build\lib.win-amd64-cpython-311\lxml\includes
      copying src\lxml\includes\xmlparser.pxd -> build\lib.win-amd64-cpython-311\lxml\includes
      copying src\lxml\includes\xmlschema.pxd -> build\lib.win-amd64-cpython-311\lxml\includes
      copying src\lxml\includes\xpath.pxd -> build\lib.win-amd64-cpython-311\lxml\includes
      copying src\lxml\includes\xslt.pxd -> build\lib.win-amd64-cpython-311\lxml\includes
      copying src\lxml\includes\__init__.pxd -> build\lib.win-amd64-cpython-311\lxml\includes
      copying src\lxml\includes\etree_defs.h -> build\lib.win-amd64-cpython-311\lxml\includes
      copying src\lxml\includes\lxml-version.h -> build\lib.win-amd64-cpython-311\lxml\includes
      creating build\lib.win-amd64-cpython-311\lxml\isoschematron\resources
      creating build\lib.win-amd64-cpython-311\lxml\isoschematron\resources\rng
      copying src\lxml\isoschematron\resources\rng\iso-schematron.rng -> build\lib.win-amd64-cpython-311\lxml\isoschematron\resources\rng
      creating build\lib.win-amd64-cpython-311\lxml\isoschematron\resources\xsl
      copying src\lxml\isoschematron\resources\xsl\RNG2Schtrn.xsl -> build\lib.win-amd64-cpython-311\lxml\isoschematron\resources\xsl
      copying src\lxml\isoschematron\resources\xsl\XSD2Schtrn.xsl -> build\lib.win-amd64-cpython-311\lxml\isoschematron\resources\xsl
      creating build\lib.win-amd64-cpython-311\lxml\isoschematron\resources\xsl\iso-schematron-xslt1
      copying src\lxml\isoschematron\resources\xsl\iso-schematron-xslt1\iso_abstract_expand.xsl -> build\lib.win-amd64-cpython-311\lxml\isoschematron\resources\xsl\iso-schematron-xslt1       
      copying src\lxml\isoschematron\resources\xsl\iso-schematron-xslt1\iso_dsdl_include.xsl -> build\lib.win-amd64-cpython-311\lxml\isoschematron\resources\xsl\iso-schematron-xslt1
      copying src\lxml\isoschematron\resources\xsl\iso-schematron-xslt1\iso_schematron_message.xsl -> build\lib.win-amd64-cpython-311\lxml\isoschematron\resources\xsl\iso-schematron-xslt1    
      copying src\lxml\isoschematron\resources\xsl\iso-schematron-xslt1\iso_schematron_skeleton_for_xslt1.xsl -> build\lib.win-amd64-cpython-311\lxml\isoschematron\resources\xsl\iso-schematron-xslt1
      copying src\lxml\isoschematron\resources\xsl\iso-schematron-xslt1\iso_svrl_for_xslt1.xsl -> build\lib.win-amd64-cpython-311\lxml\isoschematron\resources\xsl\iso-schematron-xslt1        
      copying src\lxml\isoschematron\resources\xsl\iso-schematron-xslt1\readme.txt -> build\lib.win-amd64-cpython-311\lxml\isoschematron\resources\xsl\iso-schematron-xslt1
      running build_ext
      building 'lxml.etree' extension
      error: Microsoft Visual C++ 14.0 or greater is required. Get it with "Microsoft C++ Build Tools": https://visualstudio.microsoft.com/visual-cpp-build-tools/
      [end of output]

  note: This error originates from a subprocess, and is likely not a problem with pip.
  ERROR: Failed building wheel for lxml
  Running setup.py clean for lxml
Failed to build lxml
Installing collected packages: lxml
  Running setup.py install for lxml ... error
  error: subprocess-exited-with-error

  × Running setup.py install for lxml did not run successfully.
  │ exit code: 1
  ╰─> [76 lines of output]
      Building lxml version 4.9.1.
      Building without Cython.
      Building against pre-built libxml2 andl libxslt libraries
      running install
      C:\Users\chharlie\AppData\Local\Programs\Python\Python311\Lib\site-packages\setuptools\command\install.py:34: SetuptoolsDeprecationWarning: setup.py install is deprecated. Use build and pip and other standards-based tools.
        warnings.warn(
      running build
      running build_py
      creating build
      creating build\lib.win-amd64-cpython-311
      creating build\lib.win-amd64-cpython-311\lxml
      copying src\lxml\builder.py -> build\lib.win-amd64-cpython-311\lxml
      copying src\lxml\cssselect.py -> build\lib.win-amd64-cpython-311\lxml
      copying src\lxml\doctestcompare.py -> build\lib.win-amd64-cpython-311\lxml
      copying src\lxml\ElementInclude.py -> build\lib.win-amd64-cpython-311\lxml
      copying src\lxml\pyclasslookup.py -> build\lib.win-amd64-cpython-311\lxml
      copying src\lxml\sax.py -> build\lib.win-amd64-cpython-311\lxml
      copying src\lxml\usedoctest.py -> build\lib.win-amd64-cpython-311\lxml
      copying src\lxml\_elementpath.py -> build\lib.win-amd64-cpython-311\lxml
      copying src\lxml\__init__.py -> build\lib.win-amd64-cpython-311\lxml
      creating build\lib.win-amd64-cpython-311\lxml\includes
      copying src\lxml\includes\__init__.py -> build\lib.win-amd64-cpython-311\lxml\includes
      creating build\lib.win-amd64-cpython-311\lxml\html
      copying src\lxml\html\builder.py -> build\lib.win-amd64-cpython-311\lxml\html
      copying src\lxml\html\clean.py -> build\lib.win-amd64-cpython-311\lxml\html
      copying src\lxml\html\defs.py -> build\lib.win-amd64-cpython-311\lxml\html
      copying src\lxml\html\diff.py -> build\lib.win-amd64-cpython-311\lxml\html
      copying src\lxml\html\ElementSoup.py -> build\lib.win-amd64-cpython-311\lxml\html
      copying src\lxml\html\formfill.py -> build\lib.win-amd64-cpython-311\lxml\html
      copying src\lxml\html\html5parser.py -> build\lib.win-amd64-cpython-311\lxml\html
      copying src\lxml\html\soupparser.py -> build\lib.win-amd64-cpython-311\lxml\html
      copying src\lxml\html\usedoctest.py -> build\lib.win-amd64-cpython-311\lxml\html
      copying src\lxml\html\_diffcommand.py -> build\lib.win-amd64-cpython-311\lxml\html
      copying src\lxml\html\_html5builder.py -> build\lib.win-amd64-cpython-311\lxml\html
      copying src\lxml\html\_setmixin.py -> build\lib.win-amd64-cpython-311\lxml\html
      copying src\lxml\html\__init__.py -> build\lib.win-amd64-cpython-311\lxml\html
      creating build\lib.win-amd64-cpython-311\lxml\isoschematron
      copying src\lxml\isoschematron\__init__.py -> build\lib.win-amd64-cpython-311\lxml\isoschematron
      copying src\lxml\etree.h -> build\lib.win-amd64-cpython-311\lxml
      copying src\lxml\etree_api.h -> build\lib.win-amd64-cpython-311\lxml
      copying src\lxml\lxml.etree.h -> build\lib.win-amd64-cpython-311\lxml
      copying src\lxml\lxml.etree_api.h -> build\lib.win-amd64-cpython-311\lxml
      copying src\lxml\includes\c14n.pxd -> build\lib.win-amd64-cpython-311\lxml\includes
      copying src\lxml\includes\config.pxd -> build\lib.win-amd64-cpython-311\lxml\includes
      copying src\lxml\includes\dtdvalid.pxd -> build\lib.win-amd64-cpython-311\lxml\includes
      copying src\lxml\includes\etreepublic.pxd -> build\lib.win-amd64-cpython-311\lxml\includes
      copying src\lxml\includes\htmlparser.pxd -> build\lib.win-amd64-cpython-311\lxml\includes
      copying src\lxml\includes\relaxng.pxd -> build\lib.win-amd64-cpython-311\lxml\includes
      copying src\lxml\includes\schematron.pxd -> build\lib.win-amd64-cpython-311\lxml\includes
      copying src\lxml\includes\tree.pxd -> build\lib.win-amd64-cpython-311\lxml\includes
      copying src\lxml\includes\uri.pxd -> build\lib.win-amd64-cpython-311\lxml\includes
      copying src\lxml\includes\xinclude.pxd -> build\lib.win-amd64-cpython-311\lxml\includes
      copying src\lxml\includes\xmlerror.pxd -> build\lib.win-amd64-cpython-311\lxml\includes
      copying src\lxml\includes\xmlparser.pxd -> build\lib.win-amd64-cpython-311\lxml\includes
      copying src\lxml\includes\xmlschema.pxd -> build\lib.win-amd64-cpython-311\lxml\includes
      copying src\lxml\includes\xpath.pxd -> build\lib.win-amd64-cpython-311\lxml\includes
      copying src\lxml\includes\xslt.pxd -> build\lib.win-amd64-cpython-311\lxml\includes
      copying src\lxml\includes\__init__.pxd -> build\lib.win-amd64-cpython-311\lxml\includes
      copying src\lxml\includes\etree_defs.h -> build\lib.win-amd64-cpython-311\lxml\includes
      copying src\lxml\includes\lxml-version.h -> build\lib.win-amd64-cpython-311\lxml\includes
      creating build\lib.win-amd64-cpython-311\lxml\isoschematron\resources
      creating build\lib.win-amd64-cpython-311\lxml\isoschematron\resources\rng
      copying src\lxml\isoschematron\resources\rng\iso-schematron.rng -> build\lib.win-amd64-cpython-311\lxml\isoschematron\resources\rng
      creating build\lib.win-amd64-cpython-311\lxml\isoschematron\resources\xsl
      copying src\lxml\isoschematron\resources\xsl\RNG2Schtrn.xsl -> build\lib.win-amd64-cpython-311\lxml\isoschematron\resources\xsl
      copying src\lxml\isoschematron\resources\xsl\XSD2Schtrn.xsl -> build\lib.win-amd64-cpython-311\lxml\isoschematron\resources\xsl
      creating build\lib.win-amd64-cpython-311\lxml\isoschematron\resources\xsl\iso-schematron-xslt1
      copying src\lxml\isoschematron\resources\xsl\iso-schematron-xslt1\iso_abstract_expand.xsl -> build\lib.win-amd64-cpython-311\lxml\isoschematron\resources\xsl\iso-schematron-xslt1       
      copying src\lxml\isoschematron\resources\xsl\iso-schematron-xslt1\iso_dsdl_include.xsl -> build\lib.win-amd64-cpython-311\lxml\isoschematron\resources\xsl\iso-schematron-xslt1
      copying src\lxml\isoschematron\resources\xsl\iso-schematron-xslt1\iso_schematron_message.xsl -> build\lib.win-amd64-cpython-311\lxml\isoschematron\resources\xsl\iso-schematron-xslt1    
n-xslt1
      copying src\lxml\isoschematron\resources\xsl\iso-schematron-xslt1\iso_svrl_for_xslt1.xsl -> build\lib.win-amd64-cpython-311\lxml\isoschematron\resources\xsl\iso-schematron-xslt1        
      copying src\lxml\isoschematron\resources\xsl\iso-schematron-xslt1\readme.txt -> build\lib.win-amd64-cpython-311\lxml\isoschematron\resources\xsl\iso-schematron-xslt1
      running build_ext
      building 'lxml.etree' extension
      error: Microsoft Visual C++ 14.0 or greater is required. Get it with "Microsoft C++ Build Tools": https://visualstudio.microsoft.com/visual-cpp-build-tools/
      [end of output]

error: legacy-install-failure

× Encountered error while trying to install package.
╰─> lxml

note: This is an issue with the package mentioned above, not pip.
hint: See above for output from the failure.

You can see at the end it states the 'legacy-install-failure', as well as a suggestion to download Visual C++ 14.0. I have done this. When trying to download LXML from the original site, and installing it into my \scripts\ folder in python311 through CMD, I am faced with

PS C:\Users\chharlie\Downloads> C:\Users\chharlie\AppData\Local\Programs\Python\Python311\Scripts\pip install "lxml-4.9.0-cp311-cp311-win32.whl"
ERROR: lxml-4.9.0-cp311-cp311-win32.whl is not a supported wheel on this platform.

You can see I used the Windows 32 version to attempt a successful install, in case the 64 version wouldn't work for some reason.

It seems as if Python is having trouble building a 'wheel' for lxml, among possible other errors. Apologies, I'm still a beginner.

Thanks for any help. This is my first Stack Overflow post, so apologies if anything is done wrong.

Reld answered 6/11, 2022 at 1:38 Comment(0)
P
3

Found the solution!

Just uninstall your Python 3.11 and install 3.10.7 version instead. After that lxml is installing successfully.

Psittacine answered 8/11, 2022 at 14:14 Comment(0)
G
1

So... we will be walking down this road you and I for the foreseeable future. I am only slightly ahead of you in your OP...

libxml2 and libxslt are not installed (or some error message to this effect)

lxml requires these libraries to be installed and, no, you cannot intall them in python. They have to be compiled in VC studio (part of the package you dl'd above). I have built and compiled libxml2, but I am still getting the same error message. I appears that the pip installer does not see that I have done anything in this regard. However, I am running a venv and that may differ from what you are doing in your attempt to install lxml. I have not tried to install lxml globally yet.

I did download a file based on my python version from the following site:

https://www.lfd.uci.edu/~gohlke/pythonlibs/#lxml

I installed this locally in the same folder as my venv and it worked for what I needed apparently (although the lmxl version is 4.9.0 where I needed 4.9.1). I believe the file is just the python bindings.

There is this site:

https://lxml.de/installation.html

... but Windows builds apparently seem to be the bane of existence when it come to C builds. The site, however, is quite informative.

Stay with me and we may solve this together. I literally am only 18 hours ahead of you in my journey (just tried to install lxml late last night).

Grandpapa answered 6/11, 2022 at 21:37 Comment(0)
P
1

I've got the same error. It first appeared during installing python-docx library for my another project. Then I've tried to install just the lxml library and got this error with the same log as you guys. I've tried everything you mentioned here and it didn't help. Ended up reinstalling my OS (Windows 10), installing pure Python 3.11 on it. Then I've tried to install lxml again, but that didn't do the trick either.

Psittacine answered 7/11, 2022 at 21:21 Comment(0)
D
1

Hi I encountered the same problems as well, and I installed it by downloading lxml from https://www.lfd.uci.edu/~gohlke/pythonlibs/#lxml here. Then, put it into the folder and typed pip install "filename", and it was installed successfully. enter image description here

Ding answered 16/11, 2022 at 15:37 Comment(0)
V
1

I've got the same problem. I solved it after the manual installation of the packages lxml, libxml2, libxslt for Python 3.11 on Windows 10 as reported in this topic:

Installing lxml, libxml2, libxslt for Python 3.5 on Windows 10

I hope it can be of help.

Veator answered 20/11, 2022 at 20:39 Comment(0)

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