Reference library

Streaming & messaging

Kafka-style pub/sub, event consumers, async pipelines, and message-driven workflows.

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Streaming & messaging easy

Dedupe processed message IDs in Python

Filters an inbox of messages by removing items whose IDs have already been processed, using a set for fast lookups.

deduplication streaming json
Python 
from pathlib import Path
import json


def dedupe_processed_ids(inbox_file: Path, processed_file: Path) -> list:
    processed = set(json.loads(processed_file.read_text()))
    inbox = json.loads(inbox_file.read_text())
    deduped = [item for item in inbox if item["id"] not in processed]
    return deduped


if __nam…
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