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Задание_2.2._ВСР_Щербинин_А._В./mult.py

+import threading
+import time
+
+class SafeSingleton:
+    _instance = None
+    _lock = threading.Lock()
+
+    def __new__(cls):
+        if cls._instance is None:
+            with cls._lock:
+                if cls._instance is None:
+                    time.sleep(0.01)
+                    cls._instance = super(SafeSingleton, cls).__new__(cls)
+        return cls._instance
+
+instances = []
+
+def create_instance():
+    instance = SafeSingleton()
+    instances.append(instance)
+
+if __name__ == "__main__":
+    threads = [threading.Thread(target=create_instance) for _ in range(10)]
+
+    for t in threads:
+        t.start()
+
+    # time.sleep(0.01)
+
+    for t in threads:
+        t.join()
+
+    unique_instances = set(instances)
+    print(f"Создано {len(unique_instances)} уникальных экземпляров Singleton.")