benchpress_eval/io.py

from __future__ import annotations

import json
from pathlib import Path
from typing import Any

import pandas as pd


def read_table(path: str | Path) -> pd.DataFrame:
    """Read a CSV, JSONL, JSON, or Parquet table."""
    path = Path(path)
    suffix = path.suffix.lower()
    if suffix == ".parquet":
        return pd.read_parquet(path)
    if suffix == ".csv":
        return pd.read_csv(path)
    if suffix == ".jsonl":
        return pd.read_json(path, lines=True)
    if suffix == ".json":
        return pd.read_json(path)
    raise ValueError(f"Unsupported table format: {path}")


def write_json(obj: dict[str, Any], path: str | Path) -> None:
    path = Path(path)
    path.parent.mkdir(parents=True, exist_ok=True)
    path.write_text(json.dumps(obj, indent=2, sort_keys=True) + "\n", encoding="utf-8")


def write_csv(df: pd.DataFrame, path: str | Path) -> None:
    path = Path(path)
    path.parent.mkdir(parents=True, exist_ok=True)
    df.to_csv(path, index=False)