fix errors after renaming variables hinted by ruff

src/fc/qemu/agent.py

@@ -442,7 +442,7 @@ def _get_maintenance_lock_info(self):
             return f"<unknown due to error: {e}>"
 
     @classmethod
-    def maintenance_enter(cls):
+    def maintenance_enter(cls) -> None:
         """Prepare the host for maintenance mode.
 
         process exit codes signal success or (temporary) failure
@@ -501,7 +501,8 @@ def maintenance_enter(cls):
                 ["pgrep", "-f", "qemu-system-x86_64"], stdout=subprocess.PIPE
             )
             process.wait()
-            num_procs = len(p.stdout.read().splitlines())
+            assert process.stdout is not None
+            num_procs = len(process.stdout.read().splitlines())
             log.info(
                 "evacuation-running",
                 vms=num_procs,
@@ -552,7 +553,7 @@ def maintenance_leave(cls):
             )
 
     @classmethod
-    def shutdown_all(cls):
+    def shutdown_all(cls) -> None:
         """Shut down all VMs cleanly.
 
         Runs the shutdowns in parallel to speed up host reboots.

src/fc/qemu/logging.py

@@ -73,7 +73,7 @@ class MultiOptimisticLogger(object):
     def __init__(self, loggers):
         self.loggers = loggers
 
-    def __repr__(self):
+    def __repr__(self) -> str:
         return "<MultiOptimisticLogger {}>".format(
             [repr(logger) for logger in self.loggers]
         )

tests/hazmat/test_ceph.py

@@ -53,7 +53,7 @@ def test_multiple_images_raises_error(ceph_inst):
 
 @pytest.mark.timeout(60)
 @pytest.mark.live()
-def test_rbd_pool_migration(ceph_inst, patterns):
+def test_rbd_pool_migration(ceph_inst, patterns) -> None:
     ceph_inst.cfg["tmp_size"] = 50 * 1024 * 1024
     ceph_inst.cfg["swap_size"] = 50 * 1024 * 1024
     ceph_inst.cfg["root_size"] = 50 * 1024 * 1024