Fix python import paths in bazel tests:
- `//tools/distrib/python/grpcio_tools/grpc_tools/test:protoc_test`
- `//examples/python/cancellation:test/_cancellation_example_test`
- `//examples/python/compression:test/compression_example_test`
Previously paths were set incorrectly. With bazel + python 3.11, this resulted in the following errors:
<details>
<summary>error examples for posterity</summary>
#### `//tools/distrib/python/grpcio_tools/grpc_tools/test:protoc_test`
```
Traceback (most recent call last):
File "/root/.cache/bazel/_bazel_root/954bb7512d44d20015390af6e76121c6/sandbox/processwrapper-sandbox/3073/execroot/com_github_grpc_grpc/bazel-out/k8-fastbuild/bin/tools/distrib/python/grpcio_tools/grpc_tools/test/protoc_test.runfiles/com_github_grpc_grpc/tools/distrib/python/grpcio_tools/grpc_tools/test/protoc_test.py", line 141, in _test_syntax_errors
protos = protoc._protos("flawed.proto")
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/root/.cache/bazel/_bazel_root/954bb7512d44d20015390af6e76121c6/sandbox/processwrapper-sandbox/3073/execroot/com_github_grpc_grpc/bazel-out/k8-fastbuild/bin/tools/distrib/python/grpcio_tools/grpc_tools/test/protoc_test.runfiles/com_github_grpc_grpc/tools/distrib/python/grpcio_tools/grpc_tools/protoc.py", line 110, in _protos
module = importlib.import_module(module_name)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/local/lib/python3.11/importlib/__init__.py", line 126, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "", line 1204, in _gcd_import
File "", line 1176, in _find_and_load
File "", line 1140, in _find_and_load_unlocked
ModuleNotFoundError: No module named 'flawed_pb2'
Traceback (most recent call last):
File "/root/.cache/bazel/_bazel_root/954bb7512d44d20015390af6e76121c6/sandbox/processwrapper-sandbox/3073/execroot/com_github_grpc_grpc/bazel-out/k8-fastbuild/bin/tools/distrib/python/grpcio_tools/grpc_tools/test/protoc_test.runfiles/com_github_grpc_grpc/tools/distrib/python/grpcio_tools/grpc_tools/test/protoc_test.py", line 168, in test_combined_import
_run_in_subprocess(_test_combined_import)
File "/root/.cache/bazel/_bazel_root/954bb7512d44d20015390af6e76121c6/sandbox/processwrapper-sandbox/3073/execroot/com_github_grpc_grpc/bazel-out/k8-fastbuild/bin/tools/distrib/python/grpcio_tools/grpc_tools/test/protoc_test.runfiles/com_github_grpc_grpc/tools/distrib/python/grpcio_tools/grpc_tools/test/protoc_test.py", line 48, in _run_in_subprocess
raise error_queue.get()
ModuleNotFoundError: No module named 'simple_pb2'
```
#### `//examples/python/cancellation:test/_cancellation_example_test`
```
test_graceful_sigint (__main__.CancellationExampleTest.test_graceful_sigint) ... Traceback (most recent call last):
File "/root/.cache/bazel/_bazel_root/954bb7512d44d20015390af6e76121c6/sandbox/processwrapper-sandbox/3027/execroot/com_github_grpc_grpc/bazel-out/k8-fastbuild/bin/examples/python/cancellation/test/_cancellation_example_test.runfiles/com_github_grpc_grpc/examples/python/cancellation/server.py", line 26, in
import search
ModuleNotFoundError: No module named 'search'
```
#### `//examples/python/compression:test/compression_example_test`
```
test_compression_example (__main__.CompressionExampleTest.test_compression_example) ... Traceback (most recent call last):
File "/root/.cache/bazel/_bazel_root/954bb7512d44d20015390af6e76121c6/sandbox/processwrapper-sandbox/2906/execroot/com_github_grpc_grpc/bazel-out/k8-fastbuild/bin/examples/python/compression/test/compression_example_test.runfiles/com_github_grpc_grpc/examples/python/compression/client.py", line 24, in
import helloworld_pb2
ModuleNotFoundError: No module named 'helloworld_pb2'
Traceback (most recent call last):
File "/root/.cache/bazel/_bazel_root/954bb7512d44d20015390af6e76121c6/sandbox/processwrapper-sandbox/2906/execroot/com_github_grpc_grpc/bazel-out/k8-fastbuild/bin/examples/python/compression/test/compression_example_test.runfiles/com_github_grpc_grpc/examples/python/compression/server.py", line 26, in
import helloworld_pb2
ModuleNotFoundError: No module named 'helloworld_pb2'
FAIL
======================================================================
FAIL: test_compression_example (__main__.CompressionExampleTest.test_compression_example)
----------------------------------------------------------------------
Traceback (most recent call last):
File "/root/.cache/bazel/_bazel_root/954bb7512d44d20015390af6e76121c6/sandbox/processwrapper-sandbox/2906/execroot/com_github_grpc_grpc/bazel-out/k8-fastbuild/bin/examples/python/compression/test/compression_example_test.runfiles/com_github_grpc_grpc/examples/python/compression/test/compression_example_test.py", line 68, in test_compression_example
self.assertEqual(0, client_return_code)
AssertionError: 0 != 1
```
</details>
The main difference is as of Python 3.11 bazel no longer appends the directory of the file to the sys.path. For example, compression test sys.path:
1. Contains `examples/python/compression/test` in 3.10
2. Doesn't contain `examples/python/compression/test` in 3.11
Closes#40273
PiperOrigin-RevId: 786308459
Fix: https://github.com/grpc/grpc/issues/34690
Also added generated proto files to example folder so we can run example
directly.
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- Switched from yapf to black
- Reconfigure isort for black
- Resolve black/pylint idiosyncrasies
Note: I used `--experimental-string-processing` because black was
producing "implicit string concatenation", similar to what described
here: https://github.com/psf/black/issues/1837. While currently this
feature is experimental, it will be enabled by default:
https://github.com/psf/black/issues/2188. After running black with the
new string processing so that the generated code merges these `"hello" "
world"` strings concatenations, then I removed
`--experimental-string-processing` for stability, and regenerated the
code again.
To the reviewer: don't even try to open "Files Changed" tab 😄 It's
better to review commit-by-commit, and ignore `run black and isort`.
* Add isort_code.sh to sanity tests
* Run tools/distrib/isort_code.sh
* Fine tune the import order for relative imports
* Make pylint and project generation happy
* Fix a few corner cases
* Use --check instead of --diff
* The import order impacts test result somehow
* Make isort print diff and check output at the same time
* Let tools/run_tests/python_utils be firstparty library
* Run isort against latest HEAD
