Deephaven MCP

"""YAML formatter for PyArrow tables.""" import pyarrow as pa import yaml # type: ignore[import-untyped] def format_yaml(arrow_table: pa.Table) -> str: """ Format Arrow table as YAML. Args: arrow_table (pa.Table): PyArrow Table to format Returns: str: YAML-formatted string. Example: records: - id: 1 name: Alice age: 30 - id: 2 name: Bob age: 25 Note: PyYAML handles escaping and special characters automatically. """ # Use iterator to avoid loading entire table into memory records = [] for batch in arrow_table.to_batches(): records.extend(batch.to_pylist()) data = {"records": records} result: str = yaml.dump(data, default_flow_style=False, allow_unicode=True) return result