[BE][Easy][5/19] enforce style for empty lines in import segments in tools/ and torchgen/ (pytorch#129756)

See pytorch#129751 (comment). Most changes are auto-generated by linter.

You can review these PRs via:

```bash
git diff --ignore-all-space --ignore-blank-lines HEAD~1
```

Pull Request resolved: pytorch#129756
Approved by: https://github.com/ezyang

Author: XuehaiPan

tools/amd_build/build_amd.py

@@ -5,6 +5,7 @@
 import os
 import sys
 
+
 sys.path.append(
     os.path.realpath(
         os.path.join(
@@ -15,6 +16,7 @@
 
 from hipify import hipify_python  # type: ignore[import]
 
+
 parser = argparse.ArgumentParser(
     description="Top-level script for HIPifying, filling in most common parameters"
 )

tools/autograd/gen_inplace_or_view_type.py

@@ -24,7 +24,7 @@
     OptionalCType,
     symIntArrayRefT,
     SymIntT,
-    tensorT,  # See Note [Nested Arg Types]
+    tensorT,
 )
 from torchgen.code_template import CodeTemplate
 from torchgen.context import with_native_function

tools/build_libtorch.py

@@ -2,6 +2,7 @@
 import sys
 from os.path import abspath, dirname
 
+
 # By appending pytorch_root to sys.path, this module can import other torch
 # modules even when run as a standalone script. i.e., it's okay either you
 # do `python build_libtorch.py` or `python -m tools.build_libtorch`.
@@ -11,6 +12,7 @@
 from tools.build_pytorch_libs import build_caffe2
 from tools.setup_helpers.cmake import CMake
 
+
 if __name__ == "__main__":
     # Placeholder for future interface. For now just gives a nice -h.
     parser = argparse.ArgumentParser(description="Build libtorch")

tools/linter/adapters/s3_init.py

@@ -11,6 +11,7 @@
 import urllib.request
 from pathlib import Path
 
+
 # String representing the host platform (e.g. Linux, Darwin).
 HOST_PLATFORM = platform.system()
 HOST_PLATFORM_ARCH = platform.system() + "-" + platform.processor()

tools/linter/adapters/ufmt_linter.py

@@ -36,9 +36,7 @@
                     # functorch/**
                     "functorch/**",
                     # tools/**
-                    "tools/**",
                     # torchgen/**
-                    "torchgen/**",
                     # test/**
                     # test/[a-c]*/**
                     "test/[a-c]*/**",

tools/setup_helpers/gen.py

@@ -3,9 +3,11 @@
 import os.path
 import sys
 
+
 root = os.path.dirname(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
 sys.path.insert(0, root)
 
 import torchgen.gen
 
+
 torchgen.gen.main()

tools/setup_helpers/gen_unboxing.py

@@ -3,9 +3,11 @@
 import os.path
 import sys
 
+
 root = os.path.dirname(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
 sys.path.insert(0, root)
 
 import tools.jit.gen_unboxing
 
+
 tools.jit.gen_unboxing.main(sys.argv[1:])

tools/setup_helpers/generate_code.py

@@ -8,6 +8,7 @@
 
 import yaml
 
+
 try:
     # use faster C loader if available
     from yaml import CSafeLoader as YamlLoader
@@ -30,6 +31,7 @@ def generate_code(
 ) -> None:
     from tools.autograd.gen_annotated_fn_args import gen_annotated
     from tools.autograd.gen_autograd import gen_autograd, gen_autograd_python
+
     from torchgen.selective_build.selector import SelectiveBuilder
 
     # Build ATen based Variable classes

tools/stats/export_test_times.py

@@ -1,6 +1,7 @@
 import sys
 from pathlib import Path
 
+
 REPO_ROOT = Path(__file__).resolve().parent.parent.parent
 sys.path.append(str(REPO_ROOT))
 from tools.stats.import_test_stats import get_test_class_times, get_test_times

tools/stats/import_test_stats.py

@@ -10,6 +10,7 @@
 from typing import Any, Callable, cast, Dict
 from urllib.request import urlopen
 
+
 REPO_ROOT = Path(__file__).resolve().parent.parent.parent