Update guidelines and CI scripts for Python formatting

- Added guidelines for formatting Python scripts in CONTRIBUTING.md.
- Updated `.ci/check-format.sh` to streamline the check for Python file formatting.

Author: Lzzz666

.ci/check-format.sh

@@ -28,8 +28,7 @@ for file in ${PY_SOURCES}; do
 done
 PY_MISMATCH_FILE_CNT=0
 if [ -n "${PY_SOURCES}" ]; then
-    PY_MISMATCH_OUTPUT=$(black --check ${PY_SOURCES} 2>&1)
-    PY_MISMATCH_FILE_CNT=$(echo "${PY_MISMATCH_OUTPUT}" | grep -c "^would reformat ")
+    PY_MISMATCH_FILE_CNT=$(echo "$(black --check ${PY_SOURCES} 2>&1)" | grep -c "^would reformat ")
 fi
 
 exit $((C_MISMATCH_LINE_CNT + SH_MISMATCH_FILE_CNT + PY_MISMATCH_FILE_CNT))

CONTRIBUTING.md

@@ -39,6 +39,7 @@ However, participation requires adherence to fundamental ground rules:
   While there is some flexibility in basic style, it is crucial to stick to the current coding standards.
   Complex algorithmic constructs without proper comments will not be accepted.
 * Shell scripts must be formatted before submission. Use consistent flags across the project to ensure uniform formatting.
+* Python scripts must be formatted before submission. Use consistent flags across the project to ensure uniform formatting.
 * External pull requests should include thorough documentation in the pull request comments for consideration.
 * When composing documentation, code comments, and other materials in English,
   please adhere to the American English (`en_US`) dialect.
@@ -48,10 +49,14 @@ However, participation requires adherence to fundamental ground rules:
 Software requirement:
 * [clang-format](https://clang.llvm.org/docs/ClangFormat.html) version 18 or later.
 * [shfmt](https://github.com/mvdan/sh).
-* [black](https://github.com/psf/black) for Python code formatting.
+* [black](https://github.com/psf/black).
+
+To maintain a uniform style across languages, run:
+
+* `clang-format -i *.{c,h}` to apply the project’s C/C++ formatting rules from the up-to-date .clang-format file.
+* `shfmt -w $(find . -type f -name "*.sh")` to clean and standardize all shell scripts.
+* `black .` to enforce a consistent, idiomatic layout for Python code.
 
-This repository consistently contains an up-to-date `.clang-format` file with rules that match the explained ones, uses shell script formatting supported by `shfmt`, and Python code formatting with `black`.
-For maintaining a uniform coding style, execute the command `clang-format -i *.{c,h}`, `shfmt -w $(find . -type f -name "*.sh")`, and `black .` for Python files.
 
 ## Coding Style for Shell Script