# re.error

- **ID:** `python/re-error`
- **Domain:** python
- **Category:** type_error
- **Verification:** official
- **Fix Rate:** 80%

## Root Cause

Regular expression compilation failed. Invalid regex pattern or bad escape.

## Version Compatibility

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