pyproject.toml & switch to Ruff (#976)

* unify config to pyproject.toml
replace flake8 with Ruff

* drop configs

* update

* fixing

* Apply suggestions from code review

Co-authored-by: Zvi Baratz <z.baratz@gmail.com>

* setup

* ci

* pr template

* reword

---------

Co-authored-by: Zvi Baratz <z.baratz@gmail.com>
Co-authored-by: Li Jiang <lijiang1@microsoft.com>

.flake8

@@ -1,5 +0,0 @@
-[flake8]
-ignore = E203, E266, E501, W503, F403, F401, C901
-max-line-length = 127
-max-complexity = 10
-select = B,C,E,F,W,T4,B9

.github/PULL_REQUEST_TEMPLATE.md

@@ -12,7 +12,7 @@
 
 ## Checks
 
-- [ ] I've used [pre-commit](https://microsoft.github.io/FLAML/docs/Contribute#pre-commit) to lint the changes in this PR, or I've made sure [lint with flake8](https://github.com/microsoft/FLAML/blob/816a82a1155b4de4705b21a615ccdff67c6da379/.github/workflows/python-package.yml#L54-L59) output is two 0s.
+- I've used [pre-commit](https://microsoft.github.io/FLAML/docs/Contribute#pre-commit) to lint the changes in this PR (note the same in integrated in our CI checks).
 - [ ] I've included any doc changes needed for https://microsoft.github.io/FLAML/. See https://microsoft.github.io/FLAML/docs/Contribute#documentation to build and test documentation locally.
 - [ ] I've added tests (if relevant) corresponding to the changes introduced in this PR.
 - [ ] I've made sure all auto checks have passed.

.github/workflows/python-package.yml

@@ -82,12 +82,6 @@ jobs:
         run: |
           # Uninstall pyspark to test env without pyspark
           pip uninstall -y pyspark
-      - name: Lint with flake8
-        run: |
-          # stop the build if there are Python syntax errors or undefined names
-          flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
-          # exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
-          flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
       - name: Test with pytest
         if: (matrix.python-version != '3.7' || matrix.os == 'macos-latest') && matrix.python-version != '3.10'
         run: |

.pre-commit-config.yaml

@@ -7,15 +7,6 @@ ci:
   autoupdate_schedule: 'quarterly'
 
 repos:
-  - repo: https://github.com/psf/black
-    rev: 23.1.0
-    hooks:
-    - id: black
-      args: ["--line-length=120"]
-  - repo: https://github.com/pycqa/flake8
-    rev: 6.0.0
-    hooks:
-      - id: flake8
   - repo: https://github.com/pre-commit/pre-commit-hooks
     rev: v4.4.0
     hooks:
@@ -31,3 +22,12 @@ repos:
     - id: trailing-whitespace
     - id: end-of-file-fixer
     - id: no-commit-to-branch
+  - repo: https://github.com/psf/black
+    rev: 23.3.0
+    hooks:
+    - id: black
+  - repo: https://github.com/charliermarsh/ruff-pre-commit
+    rev: v0.0.261
+    hooks:
+      - id: ruff
+        args: ["--fix"]

flaml/automl/model.py

@@ -2324,10 +2324,7 @@ class HoltWinters(ARIMA):
         if self.params["trend"] == "mul" and (train_df.y == 0).sum() > 0:
             self.params["trend"] = "add"
 
-        if not self.params["seasonal"] or not self.params["trend"] in [
-            "mul",
-            "add",
-        ]:
+        if not self.params["seasonal"] or self.params["trend"] not in ["mul", "add"]:
             self.params["damped_trend"] = False
 
         model = HWExponentialSmoothing(

pyproject.toml

@@ -0,0 +1,51 @@
+[metadata]
+license_file = "LICENSE"
+description-file = "README.md"
+
+
+[tool.pytest.ini_options]
+addopts = '-m "not conda"'
+markers = [
+    "conda: test related to conda forge distribution"
+]
+
+[tool.black]
+# https://github.com/psf/black
+line-length = 120
+exclude = "(.eggs|.git|.hg|.mypy_cache|.venv|_build|buck-out|build|dist)"
+
+
+[tool.ruff]
+line-length = 120
+# Enable Pyflakes `E` and `F` codes by default.
+select = [
+    "E", "W",  # see: https://pypi.org/project/pycodestyle
+    "F",  # see: https://pypi.org/project/pyflakes
+#    "D",  # see: https://pypi.org/project/pydocstyle
+#    "N",  # see: https://pypi.org/project/pep8-naming
+#    "S",  # see: https://pypi.org/project/flake8-bandit
+]
+ignore = [
+    "E501",
+    "F401",
+    "F403",
+    "C901",
+]
+# Exclude a variety of commonly ignored directories.
+exclude = [
+    ".eggs",
+    ".git",
+    ".mypy_cache",
+    ".ruff_cache",
+    "__pypackages__",
+    "_build",
+    "build",
+    "dist",
+    "docs"
+]
+ignore-init-module-imports = true
+unfixable = ["F401"]
+
+[tool.ruff.mccabe]
+# Unlike Flake8, default to a complexity level of 10.
+max-complexity = 10

pytest.ini

@@ -1,4 +0,0 @@
-[pytest]
-addopts = -m "not conda"
-markers =
-    conda: test related to conda forge distribution

setup.py

@@ -49,7 +49,6 @@ setuptools.setup(
             "joblibspark>=0.5.0",
         ],
         "test": [
-            "flake8>=3.8.4",
             "thop",
             "pytest>=6.1.1",
             "coverage>=5.3",