Reference library

Python Code Samples

Copy-ready Python snippets by topic and difficulty — short, focused, and runnable in the browser editor.

27 matches
Streaming & messaging easy

How to Serialize and Deserialize JSON Event Payloads in Python

Define an EventPayload class with custom to_json and from_json methods to convert event objects to JSON strings and back, using datetime parsing.

json serialization datetime
Python 
import json
from datetime import datetime


class EventPayload:
    def __init__(self, event_id, event_type, timestamp, data):
        self.event_id = event_id
        self.event_type = event_type
        self.timestamp = timestamp
        self.data = data

    def to_json(self):
        return json.dumps({
          …
12 0 Open
Caching & Redis medium

How to Serialize Cache Values with JSON and Pickle in Python

Serialize cache values using JSON for simple types or pickle for arbitrary objects, with robust error handling for unsupported types like mocks.

serialization caching json
Python 
import json
import pickle
from unittest.mock import Mock

def serialize(value, method="json"):
    """Serialize a cache value using JSON or pickle with type checking."""
    if method == "json":
        try:
            return json.dumps(value).encode("utf-8")
        except TypeError as e:
            raise ValueErro…
12 0 Open
Production deployment patterns easy

How to Build a Simple Data Helper Class in Python

A beginner-friendly DataHelper class that stores Python dataclass objects as JSON records to disk, with load, add, and save methods.

dataclass json file-io
Python 
import json
from dataclasses import dataclass, asdict
from pathlib import Path

@dataclass
class User:
    name: str
    age: int
    email: str

class DataHelper:
    def __init__(self, filepath: str = "data.json"):
        self.filepath = Path(filepath)
        self._data = self._load()
    
    def _load(self) -> l…
12 0 Open

Browse by section

Each section groups closely related Python snippets.

Guide: free Python code samples library

Copy-ready Python snippets for learners and developers

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

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.