AsyncGenerator和AsyncContextManager是Python中用于异步编程的两个重要概念。
在Python中正确指定AsyncGenerator和AsyncContextManager的类型提示可以提高代码的可读性和可维护性。以下是使用AsyncGenerator和AsyncContextManager正确指定类型提示的示例代码:
from typing import AsyncGenerator
async def async_data_generator() -> AsyncGenerator[int, None]:
for i in range(10):
yield i
await asyncio.sleep(0.1)
async def main():
async for data in async_data_generator():
print(data)
asyncio.run(main())
from typing import AsyncContextManager
class AsyncResource:
async def __aenter__(self) -> int:
# 异步资源获取的逻辑
return 42
async def __aexit__(self, exc_type, exc_val, exc_tb) -> None:
# 异步资源释放的逻辑
pass
async def main():
async with AsyncResource() as resource:
print(resource)
asyncio.run(main())
请注意,以上示例代码仅为演示如何正确指定类型提示,实际使用时需要根据具体情况进行调整。
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