Drop old python versions and reformat code

Author: mosquito

pidfile/__init__.py

@@ -1,7 +1,8 @@
-from .pidfile import PIDFile, AlreadyRunningError
-from .version import version_info, __version__, __author__, author_info
+from .pidfile import AlreadyRunningError, PIDFile
+from .version import __author__, __version__, author_info, version_info
+
 
 __all__ = (
-    '__version__', '__author__', 'author_info',
-    'version_info', 'PIDFile', 'AlreadyRunningError'
+    "__version__", "__author__", "author_info",
+    "version_info", "PIDFile", "AlreadyRunningError",
 )

pidfile/pidfile.py

@@ -1,5 +1,7 @@
 import atexit
 import os
+from typing import Any
+
 import psutil
 
 
@@ -8,12 +10,12 @@ class AlreadyRunningError(Exception):
 
 
 class PIDFile(object):
-    def __init__(self, filename='pidfile'):
+    def __init__(self, filename: Any = "pidfile"):
         self._process_name = psutil.Process(os.getpid()).cmdline()[0]
-        self._file = filename
+        self._file = str(filename)
 
     @property
-    def is_running(self):
+    def is_running(self) -> bool:
         if not os.path.exists(self._file):
             return False
 
@@ -32,14 +34,14 @@ def is_running(self):
         except psutil.AccessDenied:
             return False
 
-    def close(self):
+    def close(self) -> None:
         if os.path.exists(self._file):
             try:
                 os.unlink(self._file)
             except OSError:
                 pass
 
-    def __enter__(self):
+    def __enter__(self) -> "PIDFile":
         if self.is_running:
             raise AlreadyRunningError
 
@@ -50,6 +52,6 @@ def __enter__(self):
 
         return self
 
-    def __exit__(self, *args):
+    def __exit__(self, *_) -> None:
         self.close()
         atexit.unregister(self.close)

pidfile/version.py

@@ -5,7 +5,7 @@
     ("Michele Cancilla", None),
 )
 
-version_info = (3, 1, 0)
+version_info = (3, 1, 1)
 
 __version__ = ".".join(map(str, version_info))
 __author__ = ", ".join("{0} <{1}>".format(*author) for author in author_info)

setup.py

@@ -1,21 +1,13 @@
-import sys
 import os
+import importlib.util
 from setuptools import setup, find_packages
 
 
 version_file = os.path.join('pidfile', 'version.py')
 
-if sys.version_info < (3,):
-    import imp
-    version = imp.load_source('version', version_file)
-elif sys.version_info < (3, 5):
-    from importlib.machinery import SourceFileLoader
-    version = SourceFileLoader("version", version_file).load_module()
-else:
-    import importlib.util
-    spec = importlib.util.spec_from_file_location("version", version_file)
-    version = importlib.util.module_from_spec(spec)
-    spec.loader.exec_module(version)
+spec = importlib.util.spec_from_file_location("version", version_file)
+version = importlib.util.module_from_spec(spec)
+spec.loader.exec_module(version)
 
 
 setup(
@@ -27,22 +19,20 @@
     ),
     url="https://github.com/mosquito/python-pidfile",
     license="MIT",
-    description="PIDFile context processor. Supported py2 and py3",
+    description="PIDFile context manager.",
     long_description=open('README.rst').read(),
     platforms="unix",
     classifiers=[
         'Development Status :: 5 - Production/Stable',
         'Natural Language :: English',
         'Operating System :: MacOS',
         'Operating System :: POSIX',
-        'Programming Language :: Python :: 2',
-        'Programming Language :: Python :: 2.7',
         'Programming Language :: Python :: 3',
-        'Programming Language :: Python :: 3.4',
-        'Programming Language :: Python :: 3.5',
-        'Programming Language :: Python :: 3.6',
         'Programming Language :: Python :: 3.7',
         'Programming Language :: Python :: 3.8',
+        'Programming Language :: Python :: 3.9',
+        'Programming Language :: Python :: 3.10',
+        'Programming Language :: Python :: 3.11',
         'Programming Language :: Python :: Implementation :: CPython',
         'License :: OSI Approved :: MIT License',
     ],

tests/test_pidfile.py

@@ -1,24 +1,22 @@
 from unittest import TestCase
+from unittest.mock import mock_open, patch
 
-try:
-    # Python 3.x
-    from unittest.mock import patch, mock_open
-    open_name = 'builtins.open'
-except ImportError:
-    # Python 2.7
-    from mock import patch, mock_open
-    open_name = '__builtin__.open'
 
-import pidfile
+open_name = "builtins.open"
+
 import os
+
 import psutil
 
+import pidfile
+
+
 builtins_open = open
 
 
 def open_patcher(data):
     def patched_open(*args, **kwargs):
-        if args[0] == 'pidfile':
+        if args[0] == "pidfile":
             return mock_open(read_data=data)(*args, **kwargs)
         else:
             return builtins_open(*args, **kwargs)
@@ -27,7 +25,7 @@ def patched_open(*args, **kwargs):
 
 def open_patcher_exception():
     def patched_open(*args, **kwargs):
-        if args[0] == 'pidfile':
+        if args[0] == "pidfile":
             mo = mock_open()
             mo.return_value.read.side_effect = OSError
             return mo(*args, **kwargs)
@@ -37,48 +35,52 @@ def patched_open(*args, **kwargs):
 
 
 class PIDFileTestCase(TestCase):
-    @patch(open_name, new=open_patcher('1'))
-    @patch('os.path.exists')
+    @patch(open_name, new=open_patcher("1"))
+    @patch("os.path.exists")
     def test_pidfile_not_exists(self, exists_mock):
         exists_mock.return_value = False
         with pidfile.PIDFile():
             assert True
 
-    @patch(open_name, new=open_patcher('1'))
-    @patch('psutil.pid_exists')
-    @patch('psutil.Process')
-    @patch('os.path.exists')
-    def test_pidfile_exists_process_running(self, exists_mock, Process_mock,
-                                            pid_exists_mock):
+    @patch(open_name, new=open_patcher("1"))
+    @patch("psutil.pid_exists")
+    @patch("psutil.Process")
+    @patch("os.path.exists")
+    def test_pidfile_exists_process_running(
+        self, exists_mock, Process_mock,
+        pid_exists_mock,
+    ):
         exists_mock.return_value = True
         pid_exists_mock.return_value = True
         Process_mock.return_value = psutil.Process(os.getpid())
         with self.assertRaises(pidfile.AlreadyRunningError):
             with pidfile.PIDFile():
                 assert True
 
-    @patch(open_name, new=open_patcher('1'))
-    @patch('psutil.pid_exists')
-    @patch('os.path.exists')
-    def test_pidfile_exists_process_not_running(self, exists_mock,
-                                                pid_exists_mock):
+    @patch(open_name, new=open_patcher("1"))
+    @patch("psutil.pid_exists")
+    @patch("os.path.exists")
+    def test_pidfile_exists_process_not_running(
+        self, exists_mock,
+        pid_exists_mock,
+    ):
         exists_mock.return_value = True
         pid_exists_mock.return_value = False
         with pidfile.PIDFile():
             assert True
 
-    @patch(open_name, new=open_patcher(''))
-    @patch('psutil.pid_exists')
-    @patch('os.path.exists')
+    @patch(open_name, new=open_patcher(""))
+    @patch("psutil.pid_exists")
+    @patch("os.path.exists")
     def test_pidfile_exists_empty(self, exists_mock, pid_exists_mock):
         exists_mock.return_value = True
         pid_exists_mock.return_value = True
         with pidfile.PIDFile():
             assert True
 
     @patch(open_name, new=open_patcher_exception())
-    @patch('psutil.pid_exists')
-    @patch('os.path.exists')
+    @patch("psutil.pid_exists")
+    @patch("os.path.exists")
     def test_pidfile_exists_read_fail(self, exists_mock, pid_exists_mock):
         exists_mock.return_value = True
         pid_exists_mock.return_value = True