Python inspector command fails when requirements.txt includes sys_platform

[voidpetal]

Python inspector command fails to scan when some packages include system platform information:

>python-inspector --requirement requirements.txt -p 313 -o macos --json-pdt tmp.json

Traceback (most recent call last):
  File "~/Documents/misc/python-torch-multi-platform/.venv/lib/python3.13/site-packages/python_inspector/resolve_cli.py", line 259, in resolve_dependencies
    resolution_result: Dict = resolver_api(
                              ~~~~~~~~~~~~^
        requirement_files=requirement_files,
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    ...<15 lines>...
        generic_paths=generic_paths,
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    )
    ^
  File "~/Documents/misc/python-torch-multi-platform/.venv/lib/python3.13/site-packages/python_inspector/api.py", line 283, in resolve_dependencies
    resolution, purls = resolve(
                        ~~~~~~~^
        direct_dependencies=direct_dependencies,
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    ...<8 lines>...
        printer=printer,
        ^^^^^^^^^^^^^^^^
    )
    ^
  File "~/Documents/misc/python-torch-multi-platform/.venv/lib/python3.13/site-packages/python_inspector/api.py", line 374, in resolve
    resolved_dependencies, packages = get_resolved_dependencies(
                                      ~~~~~~~~~~~~~~~~~~~~~~~~~^
        requirements=requirements,
        ^^^^^^^^^^^^^^^^^^^^^^^^^^
    ...<8 lines>...
        printer=printer,
        ^^^^^^^^^^^^^^^^
    )
    ^
  File "~/Documents/misc/python-torch-multi-platform/.venv/lib/python3.13/site-packages/python_inspector/api.py", line 465, in get_resolved_dependencies
    resolver_results = resolver.resolve(requirements=requirements, max_rounds=max_rounds)
  File "~/Documents/misc/python-torch-multi-platform/.venv/lib/python3.13/site-packages/resolvelib/resolvers/resolution.py", line 596, in resolve
    state = resolution.resolve(requirements, max_rounds=max_rounds)
  File "~/Documents/misc/python-torch-multi-platform/.venv/lib/python3.13/site-packages/resolvelib/resolvers/resolution.py", line 429, in resolve
    self._add_to_criteria(self.state.criteria, r, parent=None)
    ~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "~/Documents/misc/python-torch-multi-platform/.venv/lib/python3.13/site-packages/resolvelib/resolvers/resolution.py", line 125, in _add_to_criteria
    matches = self._p.find_matches(
        identifier=identifier,
    ...<9 lines>...
        ),
    )
  File "~/Documents/misc/python-torch-multi-platform/.venv/lib/python3.13/site-packages/python_inspector/resolution.py", line 634, in find_matches
    candidates = sorted(
        self._iter_matches(identifier, requirements, incompatibilities),
        key=operator.attrgetter("version"),
        reverse=True,
    )
  File "~/Documents/misc/python-torch-multi-platform/.venv/lib/python3.13/site-packages/python_inspector/resolution.py", line 617, in _iter_matches
    raise NoVersionsFound(f"This package does not exist: {name}")
python_inspector.error.NoVersionsFound: This package does not exist: torch

The requirements.txt file (https://github.com/voidpetal/pyinsp-system-platform-test/tree/main):

torch==2.8.0; sys_platform != "linux"

[MarcelBochtler]

Related to #239

[nnobelis]

Same problem with
cython==3.0.11 ; python_full_version < '3.11' and os_name != 'nt' and platform_machine == 'x86_64' and platform_python_implementation == 'CPython' and sys_platform == 'linux'
or
open3d==0.18.0 ; python_full_version < '3.11' and os_name != 'nt' and platform_machine == 'x86_64' and platform_python_implementation == 'CPython' and sys_platform == 'linux'

@pombredanne Can you, in a first time, maybe change the title of the issue to reflect better the problem ?