Increase minimum Python version to 3.9

Python 3.8 has been end of life for over a year. A lot of tools
stopped supporting Python 3.8.

Author: igo95862

README.md

@@ -34,7 +34,7 @@ Also see [`examples/`](examples/) folder for code examples.
 
 ## Requirements
 
-* Python version 3.7 or higher
+* Python version 3.9 or higher
 
 ### [PyPI wheels](https://pypi.org/project/lxns/)
 

examples/add_bind_mount.py

@@ -27,9 +27,10 @@ def create_tree_clone(what: str) -> ClonedTree:
 
 
 def main(pid: int, what: str, where: str) -> None:
-    with MountNamespace.from_pid(
-        pid
-    ) as target_mount_ns, target_mount_ns.get_user_namespace() as target_user_ns:
+    with (
+        MountNamespace.from_pid(pid) as target_mount_ns,
+        target_mount_ns.get_user_namespace() as target_user_ns,
+    ):
         # Join target user namespace
         target_user_ns.setns()  # This should give us CAP_SYS_ADMIN
         # Don't join the mount namespace until we clone the tree'

pyproject.toml

@@ -9,7 +9,7 @@ license = {text = "MPL-2.0"}
 authors = [
     {name = "igo95862"}
 ]
-requires-python = ">= 3.7"
+requires-python = ">= 3.9"
 keywords = ["linux", "namespace", "namespaces", "mount", "sandbox", "containers"]
 classifiers = [
     "Development Status :: 4 - Beta",

src/lxns/meson.build

@@ -10,7 +10,7 @@ endif
 
 limited_api = ''
 if get_option('use_limited_api')
-    limited_api = '3.7'
+    limited_api = '3.9'
 endif
 
 mount_api_found_open_tree = false

test/test_os.py

@@ -77,34 +77,40 @@ def test_unshare_user_namespace(self) -> None:
         self.assertNotEqual(uid_before_test, uid_after)
 
     def test_errors(self) -> None:
-        with self.subTest("Unshare with invalid value"), self.assertRaisesRegex(
-            OSError, "22"
+        with (
+            self.subTest("Unshare with invalid value"),
+            self.assertRaisesRegex(OSError, "22"),
         ):
             unshare(-1)
 
         with TemporaryFile() as temp_f:
-            with self.subTest("setns on invalid fd"), self.assertRaisesRegex(
-                OSError, "22"
+            with (
+                self.subTest("setns on invalid fd"),
+                self.assertRaisesRegex(OSError, "22"),
             ):
                 setns(temp_f.fileno(), 0)
 
-            with self.subTest("ns_get_userns on invalid fd"), self.assertRaisesRegex(
-                OSError, "25"
+            with (
+                self.subTest("ns_get_userns on invalid fd"),
+                self.assertRaisesRegex(OSError, "25"),
             ):
                 ns_get_userns(temp_f.fileno())
 
-            with self.subTest("ns_get_parent on invalid fd"), self.assertRaisesRegex(
-                OSError, "25"
+            with (
+                self.subTest("ns_get_parent on invalid fd"),
+                self.assertRaisesRegex(OSError, "25"),
             ):
                 ns_get_parent(temp_f.fileno())
 
-            with self.subTest("ns_get_nstype on invalid fd"), self.assertRaisesRegex(
-                OSError, "25"
+            with (
+                self.subTest("ns_get_nstype on invalid fd"),
+                self.assertRaisesRegex(OSError, "25"),
             ):
                 ns_get_nstype(temp_f.fileno())
 
-            with self.subTest("ns_get_owner_uid on invalid fd"), self.assertRaisesRegex(
-                OSError, "25"
+            with (
+                self.subTest("ns_get_owner_uid on invalid fd"),
+                self.assertRaisesRegex(OSError, "25"),
             ):
                 ns_get_owner_uid(temp_f.fileno())
 
@@ -149,11 +155,13 @@ def test_ns_get_functions(self) -> None:
                 stat(child_userns_file_path).st_ino,
             )
 
-            with open(child_userns_file_path) as child_userns_file, open(
-                ns_get_parent(child_userns_file.fileno())
-            ) as child_parent_ns_file, open(
-                ns_get_userns(child_userns_file.fileno())
-            ) as child_userns_owner_userns_file:
+            with (
+                open(child_userns_file_path) as child_userns_file,
+                open(ns_get_parent(child_userns_file.fileno())) as child_parent_ns_file,
+                open(
+                    ns_get_userns(child_userns_file.fileno())
+                ) as child_userns_owner_userns_file,
+            ):
                 self.assertEqual(
                     ns_get_owner_uid(child_userns_file.fileno()),
                     getuid(),

tools/audit_wheel_wrapper.py

@@ -9,8 +9,9 @@
 
 
 def main(arch: str, wrapped_args: list[str]) -> None:
-    with patch("sys.argv", [""] + wrapped_args), patch(
-        "platform.machine", return_value=arch
+    with (
+        patch("sys.argv", [""] + wrapped_args),
+        patch("platform.machine", return_value=arch),
     ):
         auditwheel_main()
 

tools/run_linters.py

@@ -64,7 +64,7 @@ def run_isort() -> bool:
 
 def run_mypy() -> bool:
     return run_linter(
-        ["mypy", "--pretty", "--strict", "--python-version", "3.8", *PYTHON_SOURCES]
+        ["mypy", "--pretty", "--strict", "--python-version", "3.9", *PYTHON_SOURCES]
     )