Start enforcing ruff rules

Replace flake8 with ruff.

.github/workflows/linters.yml

@@ -0,0 +1,15 @@
+name: Lint
+on:
+  pull_request:
+    branches:
+      - '*'
+permissions:
+  contents: read
+jobs:
+  ruff:
+    runs-on: ubuntu-latest
+    steps: 
+      - uses: actions/checkout@v4
+      - uses: astral-sh/ruff-action@v3
+      - name: Lint with Ruff
+        run: ruff check --output-format=github

pyedflib/__init__.py

@@ -1,5 +1,3 @@
-# flake8: noqa
-
 # Copyright (c) 2019 - 2020 Simon Kern
 # Copyright (c) 2015 - 2020 Holger Nahrstaedt
 # Copyright (c) 2016-2017 The pyedflib Developers

pyproject.toml

@@ -5,3 +5,31 @@ requires = [
     "cython"
 ]
 build-backend = "setuptools.build_meta"
+
+[tool.ruff]
+target-version = "py38"
+
+[tool.ruff.lint]
+extend-select = [
+    "UP",   # pyupgrade
+    "C4",   # flake8-comprehensions
+    "ISC",  # flake8-implicit-str-concat
+    "PIE",  # flake8-pie
+    "FLY",  # flynt
+    "PERF", # Perflint
+    "RUF",  # Ruff-specific rules
+]
+ignore = [
+    "F841",    # Local variable is assigned to but never used
+    "UP031",   # Use format specifiers instead of percent format
+    "UP032",   # Use f-string instead of `format` call
+    "ISC002",  # Implicitly concatenated string literals over multiple lines
+    "PERF203", # `try`-`except` within a loop incurs performance overhead
+    "RUF003",
+    "RUF005",  # Consider iterable unpacking instead of concatenation
+    "RUF012",  # Mutable class attributes should be annotated with `typing.ClassVar`
+    "RUF100",  # Unused `noqa` directive
+]
+
+[tool.ruff.lint.extend-per-file-ignores]
+"**/__init__.py" = ["F401", "F403"]

requirements-test.txt

@@ -1,11 +1,11 @@
 pip
 setuptools
 wheel
-flake8
 nose
 coverage
 cython
 numpy
 pytest
+ruff
 dateparser
 tqdm