Reference library

Python Code Samples

Medium snippets you can copy, study, and run in the browser editor.

3 matches
Concurrency & performance medium

How to Implement a Batch Requests Flush Interval in Python

A simple async batcher that accumulates items and flushes them either when a max batch size is reached or after a time-based flush interval.

asyncio batching concurrency
Python 
import asyncio
from collections import deque

class Batcher:
    def __init__(self, flush_interval=0.5, max_batch=5):
        self.flush_interval = flush_interval
        self.max_batch = max_batch
        self.queue = deque()
        self.lock = asyncio.Lock()

    async def add(self, item):
        async with self.l…
14 0 Open
Streaming & messaging medium

How to Mock a Kafka Producer Batch Send in Python

Simulate a Kafka producer in Python that sends batched JSON events with mock partitions and latency for testing streaming pipelines without a real broker.

kafka mock streaming
Python 
import json
import random
import time
from datetime import datetime


class MockKafkaProducer:
    def __init__(self, topic):
        self.topic = topic
        self.sent_messages = []

    def send(self, value, key=None):
        message = {
            "topic": self.topic,
            "key": key,
            "value"…
13 0 Open
Caching & Redis medium

How to Mock Redis Pipeline Batch Commands in Python

Create a lightweight MockRedis class that simulates Redis pipeline batching with SET, GET, and DELETE operations for testing without a live server.

redis pipeline mock
Python 
import redis
import time


class MockRedis:
    def __init__(self):
        self.data = {}

    def pipeline(self):
        return MockPipeline(self)

    def execute(self, commands):
        results = []
        for cmd in commands:
            op, args = cmd[0], cmd[1:]
            if op == "SET":
                se…
14 0 Open

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PythonSkillset code samples are short, focused examples organised by topic and difficulty. Every snippet is server-rendered HTML — readable by search engines and easy to copy. Open any sample, read the notes, copy the code, then press Try in editor to run it in the browser with Pyodide.

How to use this library

  1. Pick a topic section — strings, lists, files, functions, and more
  2. Open a sample, read How it works, and copy the code block
  3. Run it in the IDE, tweak values, then take a related quiz or tutorial lesson

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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.

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