from __future__ import annotations
import polars as pl
def collect_preview(lf: pl.LazyFrame, limit: int) -> list[dict[str, object]]:
"""Collect a small preview from a lazy frame."""
if limit <= 0:
return []
return lf.limit(limit).collect().to_dicts()
def collect_all(lf: pl.LazyFrame) -> list[dict[str, object]]:
"""Materialize the full lazy frame to a list of dictionaries."""
return lf.collect().to_dicts()