fix: Replace all warn() with warning()

* The warn() has been deprecated for very long time and it
  just become not available in the newest version of Python 3.13
  https://docs.python.org/3.13/whatsnew/3.13.html#logging

virtwho/config.py

@@ -402,7 +402,7 @@ def parse_file(filename):
     except InvalidOption as e:
         # When a configuration section has an Invalid Option, continue
         # See https://bugzilla.redhat.com/show_bug.cgi?id=1457101 for more info
-        logger.warn("Invalid configuration detected: %s", str(e))
+        logger.warning("Invalid configuration detected: %s", str(e))
     except DuplicateOptionError as e:
         logger.warning(str(e))
     except Exception as e:
@@ -1342,14 +1342,14 @@ def all_drop_dir_config_sections(config_dir=VW_CONF_DIR):
             conf_files = set(s for s in all_dir_content if s.endswith('.conf'))
             non_conf_files = all_dir_content - conf_files
         except OSError:
-            logger.warn("Configuration directory '%s' doesn't exist or is not accessible",
+            logger.warning("Configuration directory '%s' doesn't exist or is not accessible",
                         config_dir)
             return {}
 
         if not all_dir_content:
-            logger.warn("Configuration directory '%s' appears empty", config_dir)
+            logger.warning("Configuration directory '%s' appears empty", config_dir)
         elif not conf_files:
-            logger.warn("Configuration directory '%s' does not have any '*.conf' files but "
+            logger.warning("Configuration directory '%s' does not have any '*.conf' files but "
                         "is not empty", config_dir)
         elif non_conf_files:
             logger.debug("There are files in '%s' not ending in '*.conf' is this "
@@ -1372,7 +1372,7 @@ def has_config_files_in_drop_dir(config_dir=VW_CONF_DIR):
             all_dir_content = set(os.listdir(config_dir))
             conf_files = set(s for s in all_dir_content if s.endswith('.conf'))
         except OSError:
-            logger.warn("Configuration directory '%s' doesn't exist or is not accessible",
+            logger.warning("Configuration directory '%s' doesn't exist or is not accessible",
                         config_dir)
             return False
 

virtwho/manager/satellite/satellite.py

@@ -238,7 +238,7 @@ def hypervisorCheckIn(self, report, options=None):
                     self.server_xmlrpc.registration.virt_notify(hypervisor_systemid["system_id"], plan)
                 except xmlrpc.client.Fault as e:
                     if e.faultCode == -9:
-                        self.logger.warn("System was deleted from Satellite 5, reregistering")
+                        self.logger.warning("System was deleted from Satellite 5, re-registering")
                         hypervisor_systemid = self._load_hypervisor(hypervisor.hypervisorId,
                                                                     hypervisor_type=report.config['type'], force=True)
                         self.server_xmlrpc.registration.virt_notify(hypervisor_systemid["system_id"], plan)