fix example lint

Makefile

@@ -39,7 +39,8 @@ mpitest: ## Run all tests except for ones requiring GPU.
 
 .PHONY: example_lint
 example_lint: ## Format the Python code.
-	$(PY) -m pysen --config ./example/pysen.toml run lint
+	cp "$$($(PIP) show torch | awk '/^Location:/ { print $$2 }')/torch/__init__.py" stubs/torch/__init__.py
+	trap "rm -f stubs/torch/__init__.py" EXIT; $(PY) -m pysen --config ./example_pysen.toml run lint
 
 .PHONY: help
 help: ## Display this help message.

example/pysen.toml → example_pysen.toml

@@ -1,6 +1,3 @@
-[build-system]
-requires = ["setuptools<64", "wheel"]
-
 [tool.pysen]
 version = "0.10.1"
 
@@ -12,6 +9,10 @@ enable_mypy = true
 mypy_preset = "entry"
 line_length = 80
 py_version = "py38"
+mypy_path = ["./stubs"]
+
+[tool.pysen.lint.mypy_modules."torch.*"]
+  ignore_errors = true
 
 [[tool.pysen.lint.mypy_targets]]
-  paths = ["."]
+  paths = ["./example"]

pyproject.toml

@@ -12,6 +12,7 @@ enable_mypy = true
 mypy_preset = "strict"
 line_length = 80
 py_version = "py38"
+mypy_path = ["./stubs"]
 
 [[tool.pysen.lint.mypy_targets]]
   paths = ["pytorch_pfn_extras"]