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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

How to Count JSON Records in Python

Read a JSON file and count the number of top-level records, handling both list and dictionary structures.

json counting file-reading
Python 
import json
from pathlib import Path

def count_records(json_file):
    """Count top-level records in a JSON file."""
    with open(json_file, "r") as f:
        data = json.load(f)
    
    # Handle both list of records and dict of records
    if isinstance(data, list):
        return len(data)
    elif isinstance(da…
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