feat:初版

utils/singleton.py

@@ -0,0 +1,18 @@
+class Singleton(type):
+    _instances = {}
+
+    def __call__(cls, *args, **kwargs):
+        if cls not in cls._instances:
+            cls._instances[cls] = super().__call__(*args, **kwargs)
+        return cls._instances[cls]
+
+    @classmethod
+    def reset_instance(mcs, cls):
+        """重置指定类的单例实例"""
+        if cls in mcs._instances:
+            del mcs._instances[cls]
+
+    @classmethod
+    def reset_all(mcs):
+        """重置所有单例实例"""
+        mcs._instances.clear()