# asyncio.CancelledError

- **ID:** `python/asyncio-cancellederror`
- **Domain:** python
- **Category:** runtime_error
- **Verification:** official
- **Fix Rate:** 80%

## Root Cause

Coroutine was cancelled via .cancel() before it could complete.

## Version Compatibility

| Version | Status | Introduced | Deprecated |
|---------|--------|------------|------------|
| 3.x | active | — | — |