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Data pipelines & processing easy

How to shard output by primary key hash mod N in Python

This code computes a consistent shard index for any primary key string using an MD5 hash mod the number of shards, enabling stable key-based data distribution.

hashing sharding hashlib
Python 
import hashlib

def shard_id(primary_key: str, num_shards: int) -> int:
    """Return the shard index for a primary key using MD5 hash mod N."""
    digest = hashlib.md5(primary_key.encode("utf-8")).hexdigest()
    hash_int = int(digest, 16)
    return hash_int % num_shards

if __name__ == "__main__":
    keys = ["use…
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