(df, key)
| 276 | """ |
| 277 | |
| 278 | def _is_column_label_reference(df, key): |
| 279 | return (np.isscalar(key) or isinstance(key, tuple)) and key in df.columns |
| 280 | |
| 281 | # Ensure columns_or_index is a list |
| 282 | columns_or_index = ( |
no outgoing calls
no test coverage detected