code review

Author: crusaderky

pyproject.toml

@@ -82,19 +82,18 @@ ignore = [
 
 [tool.mypy]
 files = ["array_api_compat"]
-python_version = "3.10"
 disallow_incomplete_defs = true
 disallow_untyped_decorators = true
 disallow_untyped_defs = false  # TODO
-ignore_missing_imports = true
+ignore_missing_imports = false
 no_implicit_optional = true
 show_error_codes = true
 warn_redundant_casts = true
 warn_unused_ignores = true
 warn_unreachable = true
 
 [[tool.mypy.overrides]]
-module = ["cupy.*", "dask.*", "jax.*", "ndonnx.*", "sparse.*", "torch.*"]
+module = ["cupy.*", "cupy_backends.*", "dask.*", "jax.*", "ndonnx.*", "sparse.*", "torch.*"]
 ignore_missing_imports = true