Apply black and ruff to code, and fix some ruff lint issues. Also close

#613.

.pre-commit-config.yaml

@@ -9,7 +9,7 @@ repos:
     rev: v0.3.3
     hooks:
       - id: ruff
-        args: [--fix, --exit-non-zero-on-fix, --show-fixes]
+        args: [--fix, --exit-non-zero-on-fix, --show-fixes, --unsafe-fixes]
   - repo: https://github.com/psf/black
     rev: 24.3.0
     hooks:

ci/requirements.txt

@@ -1,6 +1,5 @@
 virtualenv>=16.6.0
 pip>=19.1.1
 setuptools>=18.0.1
-six>=1.14.0
 tox
 twine

docs/conf.py

@@ -13,7 +13,7 @@
     'sphinx.ext.extlinks',
 ]
 if os.getenv('SPELLCHECK'):
-    extensions += 'sphinxcontrib.spelling',
+    extensions += ('sphinxcontrib.spelling',)
     spelling_show_suggestions = True
     spelling_lang = 'en_US'
 

examples/adhoc-layout/example/__init__.py

@@ -2,10 +2,12 @@
 
 # test merging multiple tox runs with a platform
 # based branch
-if platform.python_implementation() == "PyPy":
+if platform.python_implementation() == 'PyPy':
+
     def add(a, b):
         return a + b
 
 else:
+
     def add(a, b):
         return a + b

examples/adhoc-layout/setup.py

@@ -3,5 +3,5 @@
 
 setup(
     name='example',
-    packages=find_packages(include=['example'])
+    packages=find_packages(include=['example']),
 )

examples/src-layout/src/example/__init__.py

@@ -2,10 +2,12 @@
 
 # test merging multiple tox runs with a platform
 # based branch
-if platform.python_implementation() == "PyPy":
+if platform.python_implementation() == 'PyPy':
+
     def add(a, b):
         return a + b
 
 else:
+
     def add(a, b):
         return a + b

setup.py

@@ -1,13 +1,8 @@
 #!/usr/bin/env python
 
 import re
-from pathlib import Path
-from glob import glob
 from itertools import chain
-from os.path import basename
-from os.path import dirname
-from os.path import join
-from os.path import splitext
+from pathlib import Path
 
 from setuptools import Command
 from setuptools import find_packages
@@ -32,24 +27,24 @@ def read(*names, **kwargs):
 class BuildWithPTH(build):
     def run(self, *args, **kwargs):
         super().run(*args, **kwargs)
-        path = join(dirname(__file__), 'src', 'pytest-cov.pth')
-        dest = join(self.build_lib, basename(path))
+        path = str(Path(__file__).parent / 'src' / 'pytest-cov.pth')
+        dest = str(Path(self.build_lib) / Path(path).name)
         self.copy_file(path, dest)
 
 
 class EasyInstallWithPTH(easy_install):
     def run(self, *args, **kwargs):
         super().run(*args, **kwargs)
-        path = join(dirname(__file__), 'src', 'pytest-cov.pth')
-        dest = join(self.install_dir, basename(path))
+        path = str(Path(__file__).parent / 'src' / 'pytest-cov.pth')
+        dest = str(Path(self.install_dir) / Path(path).name)
         self.copy_file(path, dest)
 
 
 class InstallLibWithPTH(install_lib):
     def run(self, *args, **kwargs):
         super().run(*args, **kwargs)
-        path = join(dirname(__file__), 'src', 'pytest-cov.pth')
-        dest = join(self.install_dir, basename(path))
+        path = str(Path(__file__).parent / 'src' / 'pytest-cov.pth')
+        dest = str(Path(self.install_dir) / Path(path).name)
         self.copy_file(path, dest)
         self.outputs = [dest]
 
@@ -60,13 +55,13 @@ def get_outputs(self):
 class DevelopWithPTH(develop):
     def run(self, *args, **kwargs):
         super().run(*args, **kwargs)
-        path = join(dirname(__file__), 'src', 'pytest-cov.pth')
-        dest = join(self.install_dir, basename(path))
+        path = str(Path(__file__).parent / 'src' / 'pytest-cov.pth')
+        dest = str(Path(self.install_dir) / Path(path).name)
         self.copy_file(path, dest)
 
 
 class GeneratePTH(Command):
-    user_options = []
+    user_options = ()
 
     def initialize_options(self):
         pass
@@ -75,11 +70,9 @@ def finalize_options(self):
         pass
 
     def run(self):
-        with open(join(dirname(__file__), 'src', 'pytest-cov.pth'), 'w') as fh:
-            with open(join(dirname(__file__), 'src', 'pytest-cov.embed')) as sh:
-                fh.write(
-                    f"import os, sys;exec({sh.read().replace('    ', ' ')!r})"
-                )
+        with Path(__file__).parent.joinpath('src', 'pytest-cov.pth').open('w') as fh:
+            with Path(__file__).parent.joinpath('src', 'pytest-cov.embed').open() as sh:
+                fh.write(f"import os, sys;exec({sh.read().replace('    ', ' ')!r})")
 
 
 setup(
@@ -124,19 +117,23 @@ def run(self):
         'Issue Tracker': 'https://github.com/pytest-dev/pytest-cov/issues',
     },
     keywords=[
-        'cover', 'coverage', 'pytest', 'py.test', 'distributed', 'parallel',
+        'cover',
+        'coverage',
+        'pytest',
+        'py.test',
+        'distributed',
+        'parallel',
     ],
     python_requires='>=3.8',
     install_requires=[
         'pytest>=4.6',
-        'coverage[toml]>=5.2.1'
+        'coverage[toml]>=5.2.1',
     ],
     extras_require={
         'testing': [
             'fields',
             'hunter',
             'process-tests',
-            'six',
             'pytest-xdist',
             'virtualenv',
         ]

src/pytest_cov/__init__.py

@@ -1,2 +1,3 @@
 """pytest-cov: avoid already-imported warning: PYTEST_DONT_REWRITE."""
+
 __version__ = '4.1.0'

src/pytest_cov/compat.py

@@ -1,12 +1,3 @@
-try:
-    from StringIO import StringIO
-except ImportError:
-    from io import StringIO
-
-
-StringIO  # pyflakes, this is for re-export
-
-
 class SessionWrapper:
     def __init__(self, session):
         self._session = session

src/pytest_cov/embed.py

@@ -13,6 +13,7 @@
 that code coverage is being collected we activate coverage based on
 info passed via env vars.
 """
+
 import atexit
 import os
 import signal
@@ -52,7 +53,7 @@ def init():
             data_suffix=True,
             config_file=cov_config,
             auto_data=True,
-            data_file=cov_datafile
+            data_file=cov_datafile,
         )
         cov.load()
         cov.start()
@@ -70,7 +71,7 @@ def _cleanup(cov):
         cov._auto_save = False  # prevent autosaving from cov._atexit in case the interpreter lacks atexit.unregister
         try:
             atexit.unregister(cov._atexit)
-        except Exception:
+        except Exception:  # noqa: S110
             pass
 
 
@@ -108,7 +109,7 @@ def _signal_cleanup_handler(signum, frame):
     elif signum == signal.SIGTERM:
         os._exit(128 + signum)
     elif signum == signal.SIGINT:
-        raise KeyboardInterrupt()
+        raise KeyboardInterrupt
 
 
 def cleanup_on_signal(signum):