|
51
|
1 import asyncio
|
|
|
2 import random
|
|
|
3
|
|
|
4
|
|
|
5 class database:
|
|
|
6 def __init__(self):
|
|
|
7 self.values = 0
|
|
|
8 self._lock = asyncio.Lock()
|
|
|
9
|
|
|
10 def get(self):
|
|
|
11 return self.values
|
|
|
12
|
|
|
13 def set(self, values):
|
|
|
14 self.values = values
|
|
|
15
|
|
|
16
|
|
|
17 async def add(number, db: database, random_wait: int):
|
|
|
18 async with db._lock:
|
|
|
19 current = db.get()
|
|
|
20 await asyncio.sleep(random.random() * 0.05)
|
|
|
21 db.set(current + number)
|
|
|
22
|
|
|
23
|
|
|
24 async def main():
|
|
|
25 db = database()
|
|
|
26 tasks = []
|
|
|
27 for i in range(100):
|
|
|
28 tasks.append(asyncio.create_task(
|
|
|
29 add(i, db, random.randint(1, 5))
|
|
|
30 ))
|
|
|
31 await asyncio.gather(*tasks)
|
|
|
32 print(db.get())
|
|
|
33 print(sum([i for i in range(100)]))
|
|
|
34
|
|
|
35 asyncio.run(main())
|
|
|
36
|
