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Files & data

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

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Files & data medium

Read Parquet-Like Columnar CSV Chunks in Python

A Python generator that reads a CSV file column-by-column, yielding dictionary chunks where each key points to a list of values—mirroring how Parquet stores data columnar.

csv columnar generator
Python 
```python
import csv
from pathlib import Path
from typing import Iterator, List

def read_parquet_like_columnar(csv_path: str, column_names: List[str], chunk_size: int = 2) -> Iterator[dict]:
    """Read CSV data in columnar chunks, similar to how parquet stores columns."""
    csv_file = Path(csv_path)
    with csv_f…
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