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package resolution fails with TypeError: '<' not supported between instances of 'str' and 'NoneType' #240
Description
python-inspector --python-version 313 --operating-system linux --json-pdt python-inspector.json --requirement requirements.txt --verbose
returns the following error message:
retrieve package data from pypi:
retrieved package 'pkg:pypi/aiohappyeyeballs@2.6.1'
retrieved package 'pkg:pypi/aiosignal@1.3.2'
retrieved package 'pkg:pypi/annotated-types@0.7.0'
retrieved package 'pkg:pypi/aiohttp@3.11.18'
retrieved package 'pkg:pypi/anyio@4.9.0'
retrieved package 'pkg:pypi/asgiref@3.8.1'
retrieved package 'pkg:pypi/attrs@25.3.0'
retrieved package 'pkg:pypi/azure-common@1.1.28'
Traceback (most recent call last):
File "/home/scheer/.local/lib/python3.12/site-packages/python_inspector/resolve_cli.py", line 259, in resolve_dependencies
resolution_result: Dict = resolver_api(
^^^^^^^^^^^^^
File "/home/scheer/.local/lib/python3.12/site-packages/python_inspector/api.py", line 312, in resolve_dependencies
packages = [pkg.to_dict() for pkg in asyncio.run(gather_pypi_data()) if pkg is not None]
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3.12/asyncio/runners.py", line 194, in run
return runner.run(main)
^^^^^^^^^^^^^^^^
File "/usr/lib/python3.12/asyncio/runners.py", line 118, in run
return self._loop.run_until_complete(task)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3.12/asyncio/base_events.py", line 687, in run_until_complete
return future.result()
^^^^^^^^^^^^^^^
File "/home/scheer/.local/lib/python3.12/site-packages/python_inspector/api.py", line 310, in gather_pypi_data
return await asyncio.gather(*[get_pypi_data(package) for package in purls])
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/scheer/.local/lib/python3.12/site-packages/python_inspector/api.py", line 298, in get_pypi_data
data = await get_pypi_data_from_purl(
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/scheer/.local/lib/python3.12/site-packages/python_inspector/package_data.py", line 82, in get_pypi_data_from_purl
wheel_url = choose_single_wheel(wheel_urls)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/scheer/.local/lib/python3.12/site-packages/python_inspector/package_data.py", line 128, in choose_single_wheel
wheel_urls.sort(reverse=True)
TypeError: '<' not supported between instances of 'str' and 'NoneType'
Activity
thomasscheer commentedon Aug 5, 2025
requirements.txt
thomasscheer commentedon Nov 20, 2025
I found a very simple solution which works at least at my requirements.txt. The reason for the error is a none return value from wheel_urls, means no wheel for the retrieved package could be found.
package_data.py:
wheels_urls.sort expects a string and fails on none.
so the fix is a add a new command the line BEFORE wheel_urls.sort(reverse=True) to skip the none value:
Could somebody please retribute this change to the project.
TG1999 commentedon Nov 24, 2025
Hey @thomasscheer, thanks for catching this. Can you please do the above changes in a PR ?
thomasscheer commentedon Nov 27, 2025
@TG1999 Currently I'm not allowed to push my branch to the repository of python-inspector. So I can't create a PR.
TG1999 commentedon Nov 27, 2025
Hey, @thomasscheer you can make a fork, and create a PR from the fork
thomasscheer commentedon Feb 3, 2026
@TG1999 PR created with Update package_data.py #255