# ValueError: No objects to concatenate

- **ID:** `python/pandas-concat-empty`
- **Domain:** python
- **Category:** data_error
- **Verification:** ai_generated
- **Fix Rate:** 80%

## Root Cause

pd.concat called with an empty list of DataFrames.

## Version Compatibility

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

## Workarounds

1. **** (95% success)
   ```
   if dfs: result = pd.concat(dfs, ignore_index=True) else: result = pd.DataFrame()
   ```
2. **** (90% success)
   ```
   pd.concat(dfs or [pd.DataFrame()], ignore_index=True)
   ```

## Dead Ends

- **** — Propagates None into downstream code (75% fail)
- **** — Creates unexpected row/column structure (70% fail)