Reference library

Streaming & messaging

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

1 match
Streaming & messaging easy

Mock NATS queue group load balancing in Python

Simulates a NATS queue group where each message is delivered to exactly one subscriber using random selection with a lightweight mock.

nats queue-group messaging
Python 
import random
import time
from collections import defaultdict


class MockQueueGroup:
    """Mock a NATS queue group: each message is delivered to exactly one subscriber."""

    def __init__(self, subscribers):
        self.subscribers = subscribers

    def publish(self, message):
        receiver = random.choice(se…
13 0 Open

Browse by section

Each section groups closely related Python snippets.

Streaming & messaging — Python code examples

What you will find here

This page collects streaming & messaging snippets — short, copy-ready Python you can paste into our free online IDE and run without installing anything. Each sample includes a plain-English explanation and the full source code.

Samples vs tutorials and challenges

Samples are quick reference — one concept per page. For step-by-step teaching, use our Python tutorials. To test yourself, try quizzes or coding challenges. Clean up style with the Python formatter.

Related coding tools

Free online Python IDE Write and run Python in your browser — no install. Free Python code formatter Format with autopep8 — side-by-side PEP 8 cleanup. Python code samples Copy-ready snippets to study and run in the IDE.