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Python Code Samples

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

4 matches
Errors & debugging easy

How to define an exception hierarchy for domain errors in Python

Create a custom exception hierarchy with a base DomainError class and specific subclasses to handle validation, not-found, permission, and concurrency errors cleanly in Python apps.

exceptions domain-errors error-handling
Python 
class DomainError(Exception):
    """Base class for all domain errors."""
    pass

class ValidationError(DomainError):
    """Raised when input data fails validation rules."""
    pass

class NotFoundError(DomainError):
    """Raised when a requested entity does not exist."""
    pass

class PermissionDeniedError(Dom…
14 0 Open
OOP & classes easy

How to Call a Parent Class __init__ with super() in Python

Shows how to chain __init__ calls through a class hierarchy using super(), so each class sets its own attributes while reusing the parent's initialization logic.

oop inheritance super
Python 
class Animal:
    def __init__(self, name, species):
        self.name = name
        self.species = species
        print(f"Animal init: {self.name}, {self.species}")

class Mammal(Animal):
    def __init__(self, name, species, fur_color):
        super().__init__(name, species)
        self.fur_color = fur_color
   …
13 0 Open
Automation & scripting easy

How to Compress a Folder in Python While Preserving Directory Structure

A Python function that uses zipfile to recursively compress a folder, maintaining the original directory hierarchy inside the zip archive.

compression zipfile file-archiving
Python 
import os
import zipfile
from pathlib import Path

def compress_folder(source_dir: str, output_zip: str):
    """
    Compress a folder into a zip file, preserving the directory structure.
    
    Args:
        source_dir: Path to the source directory to compress
        output_zip: Path for the output zip file
    "…
35 0 Open
Observability & SRE easy

How to Link Parent and Child Span Elements in Python

This code defines a lightweight mock element class and a function that links child elements to a parent when their ranges are nested within the parent's range.

spans nesting mock
Python 
class MockElement:
    def __init__(self, name, start, end, children=None):
        self.name = name
        self.start = start
        self.end = end
        self.children = children or []

    def __repr__(self):
        return f"MockElement({self.name}, {self.start}-{self.end})"


def link_parent_child(parent, chil…
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.

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  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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