Mailman 3 April 2024 - lxml - The Python XML Toolkit

Consider keeping manylinux1 wheels for Python 3.6
by Miro Hrončok 16 May '24

16 May '24

Hello, I've noticed that lxml 5.1+ upgraded the manylinux wheels to a newer tag. The default ensurpip-bundled pip version in Python 3.6 does not support newer manylinuxes, hence it is likely that many CI systems that still test 3.6 now attempt to build lxml from sources. Since 5.2, this also fails with the old pip due to the old bundled pytoml, as indicated in a previous thread on this list. $ python3.6 -m venv venv3.6 $ venv3.6/bin/pip list Package Version ---------- ------- pip 18.1 setuptools 40.6.2 5.0.2 has a manylinux1 wheel: $ venv3.6/bin/pip install lxml==5.0.2 ... lxml-5.0.2-cp36-cp36m-manylinux_2_5_x86_64.manylinux1_x86_64.whl 5.1.0 builds from source but uses setup.py and works (with devel deps): $ venv3.6/bin/pip install lxml==5.1.0 ... lxml-5.1.0.tar.gz Running setup.py install for lxml ... 5.2.1 builds from source and will outright blow up when parsing pyproject.toml: $ venv3.6/bin/pip install lxml==5.2.1 ... lxml-5.1.0.tar.gz ... pip._vendor.pytoml.core.TomlError: /tmp/.../lxml/pyproject.toml(40, 1): msg If support for Python 3.6 is still desired, would it maybe make sense to keep building and uploading manylinux1 wheels to make it easier? -- Miro Hrončok -- Phone: +420777974800 IRC: mhroncok

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Building on Windows
by Gertjan Klein 06 May '24

06 May '24

Hi, I'd like to try a tiny change to the CDATA class. In order to try, I have to be able to build lxml. Unfortunately, on Windows. I've downloaded Visual Studio 2019 CE. I created a (Python 3.12) virtual environment, where I installed Cython (latest version). I cloned lxml sources from GitHub. I then opened a "Developer command prompt for VS 2019", activated the virtual environment, and typed: (.venv) C:\Temp\lxml\lxml>python setup.py build_ext -i --with-cython --static-deps This downloads the dependencies like libxml2 etc.; this goes without problems. Then compilation starts, and gives errors: [...] Creating library build\temp.win32-cpython-312\Release\src\lxml\etree.cp312-win_amd64.lib and object build\temp.win32-cpython-312\Release\src\lxml\etree.cp312-win_amd64.exp etree.obj : error LNK2001: unresolved external symbol _xmlStrchr etree.obj : error LNK2001: unresolved external symbol _xmlIOParseDTD etree.obj : error LNK2001: unresolved external symbol _xmlMemShow [...] There are in total 503 unresolved externals. I checked the first one, and find that is is present in the downloaded libxml2_a.lib, but without the underscore. The directories of the downloaded libraries are correctly added to the compiler command line. I am out of my depth here. I hope someone is willing to help me proceed. Kind regards, Gertjan.

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5.2.0 doesn't build
by da.ve.k.gupta＠gmail.com 03 Apr '24

03 Apr '24

I'm attempting to develop a project that has been operational for a while. The project makes use of mixbox which references this library. It seems that version 5.2.0 of lxml was released yesterday. Strangely, pytoml is encountering an error related to the pyproject.toml file. Can someone investigate this issue? #21 9.785 Saved /wheels/tox-2.7.0-py2.py3-none-any.whl 12:18:26 #21 9.806 Collecting lxml (from mixbox==1.0.5->-r requirements.txt (line 7)) 12:18:26 #21 10.88 Downloading https://.../lxml-5.2.0.tar.gz (3.7MB) 12:18:26 #21 15.22 Exception: 12:18:26 #21 15.22 Traceback (most recent call last): 12:18:26 #21 15.22 File "/usr/lib/python3/dist-packages/pip/_internal/cli/base_command.py", line 143, in main 12:18:26 #21 15.22 status = self.run(options, args) 12:18:26 #21 15.22 File "/usr/lib/python3/dist-packages/pip/_internal/commands/wheel.py", line 161, in run 12:18:26 #21 15.22 resolver.resolve(requirement_set) 12:18:26 #21 15.22 File "/usr/lib/python3/dist-packages/pip/_internal/resolve.py", line 102, in resolve 12:18:26 #21 15.22 self._resolve_one(requirement_set, req) 12:18:26 #21 15.22 File "/usr/lib/python3/dist-packages/pip/_internal/resolve.py", line 256, in _resolve_one 12:18:26 #21 15.22 abstract_dist = self._get_abstract_dist_for(req_to_install) 12:18:26 #21 15.22 File "/usr/lib/python3/dist-packages/pip/_internal/resolve.py", line 209, in _get_abstract_dist_for 12:18:26 #21 15.22 self.require_hashes 12:18:26 #21 15.22 File "/usr/lib/python3/dist-packages/pip/_internal/operations/prepare.py", line 298, in prepare_linked_requirement 12:18:26 #21 15.22 abstract_dist.prep_for_dist(finder, self.build_isolation) 12:18:26 #21 15.22 File "/usr/lib/python3/dist-packages/pip/_internal/operations/prepare.py", line 100, in prep_for_dist 12:18:26 #21 15.22 self.req.load_pyproject_toml() 12:18:26 #21 15.22 File "/usr/lib/python3/dist-packages/pip/_internal/req/req_install.py", line 428, in load_pyproject_toml 12:18:26 #21 15.22 str(self) 12:18:26 #21 15.22 File "/usr/lib/python3/dist-packages/pip/_internal/pyproject.py", line 43, in load_pyproject_toml 12:18:26 #21 15.22 pp_toml = pytoml.load(f) 12:18:26 #21 15.22 File "/usr/share/python-wheels/pytoml-0.1.2-py2.py3-none-any.whl/pytoml/parser.py", line 303, in load 12:18:26 #21 15.22 filename=fin.name) 12:18:26 #21 15.22 File "/usr/share/python-wheels/pytoml-0.1.2-py2.py3-none-any.whl/pytoml/parser.py", line 370, in loads 12:18:26 #21 15.22 toks.expect('=', 'expected_equals') 12:18:26 #21 15.22 File "/usr/share/python-wheels/pytoml-0.1.2-py2.py3-none-any.whl/pytoml/parser.py", line 250, in expect 12:18:26 #21 15.22 self.error(error_text) 12:18:26 #21 15.22 File "/usr/share/python-wheels/pytoml-0.1.2-py2.py3-none-any.whl/pytoml/parser.py", line 253, in error 12:18:26 #21 15.22 raise TomlError(message, self.pos[0][0], self.pos[0][1], self._filename) 12:18:26 #21 15.22 pytoml.core.TomlError: /tmp/pip-wheel-29w0tw8j/lxml/pyproject.toml(26, 8): expected_equals

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