When installing SearXNG (e.g.):
pip install --use-pep517 --no-build-isolation -e .
An import exception is raised:
ModuleNotFoundError: No module named 'lxml'
The ``setup.py`` file imports ``searx``, which in turn triggers various other
imports. However, the name XPath is only needed for type checking.
Closes: https://github.com/searxng/searxng/issues/5177
Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>
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