Reference library

Modern tooling

uv, ruff, pyproject.toml, packaging, and current Python project workflows.

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Modern tooling easy

Build a Textual TUI App Skeleton in Python

Create a minimal Textual terminal UI app with a header, label, button, and footer, ready for interactive mock demonstrations.

textual tui terminal
Python
from textual.app import App, ComposeResult
from textual.widgets import Header, Footer, Button, Label

class MockApp(App):
    """A minimal Textual TUI app skeleton."""

    BINDINGS = [("q", "quit", "Quit")]

    def compose(self) -> ComposeResult:
        """Create child widgets."""
        yield Header()
        yie…
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Modern tooling — Python code examples

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This page collects modern tooling snippets — short, copy-ready Python you can paste into our free online IDE and run without installing anything. Each sample includes a plain-English explanation and the full source code.

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