Reference library

Files & data

Read and write files safely; parse JSON, CSV, and common text formats.

1 match
Files & data easy

Build a Simple ETL Pipeline in Python

A simple ETL pipeline that reads JSON Lines, transforms records with filtering and normalization, and writes the result to JSON.

etl json jsonl
Python 
import json
from pathlib import Path


def read_input(file_path: Path) -> list[dict]:
    """Read JSON lines file into list of dicts."""
    with file_path.open("r", encoding="utf-8") as f:
        return [json.loads(line) for line in f if line.strip()]


def transform(records: list[dict]) -> list[dict]:
    """Transf…
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