Opt: Less pre-loads in gui.py by not importing config_updater

module/webui/setting.py

@@ -2,8 +2,41 @@ import multiprocessing
 import threading
 from multiprocessing.managers import SyncManager
 
-from module.config.config_updater import ConfigUpdater
+
-from module.webui.config import DeployConfig
+class cached_class_property:
+    """
+    Code from https://github.com/dssg/dickens
+
+    Descriptor decorator implementing a class-level, read-only
+    property, which caches its results on the class(es) on which it
+    operates.
+    Inheritance is supported, insofar as the descriptor is never hidden
+    by its cache; rather, it stores values under its access name with
+    added underscores. For example, when wrapping getters named
+    "choices", "choices_" or "_choices", each class's result is stored
+    on the class at "_choices_"; decoration of a getter named
+    "_choices_" would raise an exception.
+    """
+
+    class AliasConflict(ValueError):
+        pass
+
+    def __init__(self, func):
+        self.__func__ = func
+        self.__cache_name__ = '_{}_'.format(func.__name__.strip('_'))
+        if self.__cache_name__ == func.__name__:
+            raise self.AliasConflict(self.__cache_name__)
+
+    def __get__(self, instance, cls=None):
+        if cls is None:
+            cls = type(instance)
+
+        try:
+            return vars(cls)[self.__cache_name__]
+        except KeyError:
+            result = self.__func__(cls)
+            setattr(cls, self.__cache_name__, result)
+            return result
 
 
 class State:
@@ -14,8 +47,6 @@ class State:
     _init = False
     _clearup = False
 
-    deploy_config = DeployConfig()
-    config_updater = ConfigUpdater()
     restart_event: threading.Event = None
     manager: SyncManager = None
     electron: bool = False
@@ -30,3 +61,21 @@ class State:
     def clearup(cls):
         cls.manager.shutdown()
         cls._clearup = True
+
+    @cached_class_property
+    def deploy_config(self):
+        """
+        Returns:
+            DeployConfig：
+        """
+        from module.webui.config import DeployConfig
+        return DeployConfig()
+
+    @cached_class_property
+    def config_updater(self):
+        """
+        Returns:
+            ConfigUpdater：
+        """
+        from module.config.config_updater import ConfigUpdater
+        return ConfigUpdater()