# RuntimeError: 无法重用已 await 的协程

- **ID:** `python/asyncio-cannot-reuse-already-awaited-coroutine`
- **领域:** python
- **类别:** runtime_error
- **验证级别:** ai_generated
- **修复率:** 80%

## 根因

协程对象被 await 一次后再次 await。协程对象只能使用一次；每次调用协程函数都会产生新的协程。

## 版本兼容性

| 版本 | 状态 | 引入 | 弃用 |
|------|------|------|------|
| 3.8+ | active | — | — |
| 3.9+ | active | — | — |
| 3.10+ | active | — | — |
| 3.11+ | active | — | — |
| 3.12+ | active | — | — |

## 解决方案

1. **** (97% 成功率)
   ```
   # Wrong
c = fetch(url)
await c
await c
# Right
await fetch(url)
await fetch(url)
   ```
2. **** (92% 成功率)
   ```
   task = asyncio.create_task(fetch(url))
await task
await task  # Tasks are awaitable multiple times
   ```

## 无效尝试

- **** — The coroutine state is exhausted; send raises StopIteration immediately. (95% 失败率)
- **** — The coroutine object is already closed; ensure_future raises the same error. (90% 失败率)