get_argument_infos

app.util.helpers.generics.get_argument_infos(cls: GenericAlias, *, fail: bool = True, args: Sequence[ArgType] | None = None) → Mapping[str, ArgumentInfo][source]

Return a cached mapping of parameter names to ArgumentInfo for cls.

Results are cached via functools.lru_cache() with LRU_CACHE_MAXSIZE so repeated argument inspections stay inexpensive.

Raises:

GenericsError – If cls is not generic or any parameter cannot be resolved.

Parameters:

  • cls (GenericAlias)

  • fail (bool)

  • args (Sequence[ArgType] | None)

Return type:

Mapping[str, ArgumentInfo]