Function _basic_aggregators

python/ray/data/stats.py:259–277

Generate default metrics for all columns. This function returns a list of aggregators that compute the following metrics: - count - missing_value_percentage - approximate_top_k (top 10 most frequent values) Args: column: The name of the column to compute metrics for.

(column: str)

def _basic_aggregators(column: str) -> List[AggregateFnV2]:
    """Generate default metrics for all columns.

    This function returns a list of aggregators that compute the following metrics:
    - count
    - missing_value_percentage
    - approximate_top_k (top 10 most frequent values)

    Args:
        column: The name of the column to compute metrics for.

    Returns:
        A list of AggregateFnV2 instances that can be used with Dataset.aggregate()
    """
    return [
        Count(on=column, ignore_nulls=False),
        MissingValuePercentage(on=column),
        ApproximateTopK(on=column, k=10),
    ]


def _default_dtype_aggregators() -> Dict[