Reference library

Python Code Samples

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

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ML engineering pipelines easy

How to Create a Mock Metaflow Flow in Python

Build a minimal Metaflow flow with two sequential steps that pass data between them using instance attributes.

metaflow ml-pipelines workflow
Python 
from metaflow import FlowSpec, step, current


class MockFlow(FlowSpec):
    """A minimal Metaflow flow to demonstrate basic steps and branching."""

    @step
    def start(self):
        self.category = "mock"
        print(f"Start step for {self.category} flow")
        self.next(self.process)

    @step
    def pr…
15 0 Open

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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.