Reference library

Python Code Samples

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

3 matches
OOP & classes easy

How to Use IntEnum Arithmetic for Priority Levels in Python

Demonstrates Python IntEnum arithmetic for priority levels, showing how enum members behave like integers in calculations and comparisons.

enum intenum priority
Python 
from enum import IntEnum

class Priority(IntEnum):
    LOW = 1
    MEDIUM = 5
    HIGH = 10
    CRITICAL = 20

if __name__ == "__main__":
    current = Priority.MEDIUM
    boosted = current + 3
    lowered = current - 2
    doubled = current * 2

    print(f"Current: {current} ({current.value})")
    print(f"Boosted (…
13 0 Open
Algorithms & data structures easy

How to Heapify a List into a Min Heap with heapq in Python

Convert any list into a valid min heap in-place using Python's heapq.heapify(), then pop the smallest element to verify heap order.

heapq min heap heapify
Python 
import heapq

data = [5, 3, 8, 1, 9, 2, 7, 4, 6]
print("Original list:", data)

heapq.heapify(data)
print("Min heap:", data)

popped = heapq.heappop(data)
print("Smallest element popped:", popped)
print("Heap after pop:", data)
14 0 Open
Streaming & messaging easy

How to Implement a Priority Queue for Messages in Python

Build a message priority queue with heapq and dataclasses that pops messages by priority, using sequence numbers to keep insertion order.

priority-queue heapq dataclass
Python 
import heapq
from dataclasses import dataclass, field
from typing import Any

@dataclass(order=True)
class Message:
    priority: int
    sequence: int = field(compare=False)
    content: str = field(compare=False)

class PriorityQueue:
    def __init__(self):
        self._heap = []

    def push(self, priority: int,…
15 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.