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Data pipelines & processing

ETL-style flows, batch transforms, validation, and moving data between formats.

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Data pipelines & processing easy

Attach Source File Metadata to Records in Python

Add a source filename field to each record in a list by merging a new key into every dictionary using a dict unpacking comprehension.

lineage metadata dict-unpacking
Python 
from pathlib import Path
import json

def attach_source_metadata(records, source_file):
    """Attach source filename metadata to each record."""
    return [
        {**record, "source": Path(source_file).name}
        for record in records
    ]

if __name__ == "__main__":
    source = "/data/raw/customers.csv"
    …
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