--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/async_multi_threads/test.py	Thu Dec 25 20:07:46 2025 -0800
@@ -0,0 +1,36 @@
+import asyncio
+import random
+
+
+class database:
+    def __init__(self):
+        self.values = 0
+        self._lock = asyncio.Lock()
+
+    def get(self):
+        return self.values
+
+    def set(self, values):
+        self.values = values
+
+
+async def add(number, db: database, random_wait: int):
+    async with db._lock:
+        current = db.get()
+        await asyncio.sleep(random.random() * 0.05) 
+        db.set(current + number)
+
+
+async def main():
+    db = database()
+    tasks = []
+    for i in range(100):
+        tasks.append(asyncio.create_task(
+            add(i, db, random.randint(1, 5))
+        ))
+    await asyncio.gather(*tasks)
+    print(db.get())
+    print(sum([i for i in range(100)]))
+
+asyncio.run(main())
+