Reference library

Python Code Samples

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

1 match
ML engineering pipelines easy

Build a Mock Random Forest Classifier in Python

Create a simple random-forest-like classifier with random majority voting between trees, including fit, predict, and predict_proba methods.

random forest mock machine learning
Python
import random


class MockRandomForest:
    def __init__(self, n_trees=10, random_state=42):
        self.n_trees = n_trees
        self.random_state = random_state
        self.classes_ = None
        self._class_counts = None
        random.seed(random_state)

    def fit(self, X, y):
        self.classes_ = sorted(…
13 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.