pyratatui 0.2.2

🚀🍀 PyRatatui — Professional Python bindings for ratatui 0.30 🦀🤩 | 💥🔥 High-performance Rust TUI engine for building rich terminal applications, interactive CLIs, dashboards, and text-based UIs 💯✨

🐀 PyRatatui

Professional Python bindings for ratatui 0.30 — powered by Rust & PyO3

Build rich, high-performance terminal UIs in Python — with the full power of Rust under the hood.

Quickstart · Installation · Widgets · Effects · Examples · API Reference · Docs

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🖼️ Gallery

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What is PyRatatui?

PyRatatui exposes the entire ratatui Rust TUI library to Python via a thin, zero-overhead PyO3 extension module. You get:

• Pixel-perfect terminal rendering from ratatui's battle-tested Rust layout engine
• 30+ widgets out of the box: gauges, tables, trees, calendars, QR codes, images, markdown, and more
• TachyonFX animations — fade, sweep, glitch, dissolve, and composable effect pipelines
• Async-native — AsyncTerminal + asyncio integration for live, reactive UIs
• Full type stubs — every class and method ships with .pyi annotations for IDE autocomplete
• Cross-platform — Linux, macOS, and Windows (pre-built wheels on PyPI for all three)

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Table of Contents

• Installation
• Quickstart
• Core Concepts
• Widget Reference
• TachyonFX Effects
• Async & Reactive UIs
• CLI Tool
• API Reference
• Examples
• Building from Source
• Contributing
• License

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Installation

Recommended — Pre-built Wheel

pip install pyratatui

Pre-built wheels are published to PyPI for:

Platform	Architecture
Linux	x86_64 (manylinux2014)
macOS	x86_64 and arm64 (universal2)
Windows	x86_64

If no wheel exists for your platform, pip will automatically compile from source (requires Rust — see Building from Source).

Virtual Environment (Best Practice)

python -m venv .venv
source .venv/bin/activate        # Linux / macOS
# .venv\Scripts\activate         # Windows PowerShell

pip install pyratatui

Requirements

Requirement	Minimum	Notes
Python	3.10	3.11+ recommended
OS	Linux, macOS, Windows	crossterm backend
Rust	1.75	source builds only

Verify

import pyratatui
print(pyratatui.__version__)          # "0.2.2"
print(pyratatui.__ratatui_version__)  # "0.30"

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Quickstart

Hello World

from pyratatui import Block, Color, Paragraph, Style, Terminal

with Terminal() as term:
    while True:
        def ui(frame):
            frame.render_widget(
                Paragraph.from_string("Hello, pyratatui! 🐀  Press q to quit.")
                    .block(Block().bordered().title("Hello World"))
                    .style(Style().fg(Color.cyan())),
                frame.area,
            )
        term.draw(ui)
        ev = term.poll_event(timeout_ms=100)
        if ev and ev.code == "q":
            break

Output:

┌ Hello World ────────────────────────────────────────────┐
│ Hello, pyratatui! 🐀  Press q to quit.                  │
└─────────────────────────────────────────────────────────┘

Scaffold a New Project

pyratatui init my_app
cd my_app
pip install -r requirements.txt
python main.py

Ultra-Minimal — run_app Helper

from pyratatui import Paragraph, run_app

def ui(frame):
    frame.render_widget(
        Paragraph.from_string("Hello! Press q to quit."),
        frame.area,
    )

run_app(ui)

---

Core Concepts

Terminal & Frame

Terminal is the entry point. Use it as a context manager — it saves the terminal state, enters alternate screen mode, enables raw input, and restores everything on exit (even after exceptions).

with Terminal() as term:
    term.draw(lambda frame: ...)    # render one frame
    ev = term.poll_event(timeout_ms=50)  # KeyEvent | None

Frame is passed to every render callback. It holds the drawable area and all render methods:

def ui(frame):
    area = frame.area  # Rect — full terminal size
    frame.render_widget(widget, area)

Layout

Layout divides a Rect into child regions using constraints:

from pyratatui import Layout, Constraint, Direction

chunks = (
    Layout()
    .direction(Direction.Vertical)
    .constraints([
        Constraint.length(3),   # fixed 3 rows
        Constraint.fill(1),     # takes remaining space
        Constraint.length(1),   # fixed 1 row
    ])
    .split(frame.area)
)
header, body, footer = chunks

Constraint types:

Constraint	Description
Constraint.length(n)	Exactly n rows/columns
Constraint.percentage(pct)	pct% of available space
Constraint.fill(n)	Fill remaining space (proportionally weighted)
Constraint.min(n)	At least n rows/columns
Constraint.max(n)	At most n rows/columns
Constraint.ratio(num, den)	Fractional proportion

Styling

All styling flows through Style, Color, and Modifier:

from pyratatui import Style, Color, Modifier

style = (
    Style()
    .fg(Color.cyan())
    .bg(Color.rgb(30, 30, 46))
    .bold()
    .italic()
)

# Named colors
Color.red()    Color.green()    Color.yellow()
Color.blue()   Color.magenta()  Color.cyan()
Color.white()  Color.gray()     Color.dark_gray()
# Light variants: Color.light_red(), Color.light_green(), ...
# 256-color: Color.indexed(42)
# True-color: Color.rgb(255, 100, 0)

Text Hierarchy

Text is composed bottom-up: Span → Line → Text:

from pyratatui import Text, Line, Span, Style, Color

text = Text([
    Line([
        Span("Status: ", Style().bold()),
        Span("OK", Style().fg(Color.green())),
        Span("  |  99.9%", Style().fg(Color.cyan())),
    ]),
    Line.from_string("Plain text line"),
    Line.from_string("Right-aligned").right_aligned(),
])

frame.render_widget(Paragraph(text).block(Block().bordered()), area)

Key Events

ev = term.poll_event(timeout_ms=100)
if ev:
    print(ev.code)   # "q", "Enter", "Up", "Down", "F1", etc.
    print(ev.ctrl)   # True if Ctrl held
    print(ev.alt)    # True if Alt held
    print(ev.shift)  # True if Shift held

# Common key codes
# Letters/digits: "a", "Z", "5"
# Special:        "Enter", "Esc", "Backspace", "Tab", "BackTab"
# Arrows:         "Up", "Down", "Left", "Right"
# Function:       "F1" … "F12"
# Ctrl+C:         ev.code == "c" and ev.ctrl

Tip — Closure Capture: Always snapshot mutable state into default arguments to avoid late-binding issues in fast render loops:

count = state["count"]
def ui(frame, _count=count):  # ← captured by value, not reference
    ...

---

Widget Reference

Standard Widgets

Widget	Description
Paragraph	Single or multi-line text, wrapping, scrolling
Block	Bordered container with title, padding, and style
List + ListState	Scrollable, selectable list
Table + TableState	Multi-column table with header and footer
Gauge	Filled progress bar
LineGauge	Single-line progress indicator
BarChart	Grouped vertical bar chart
Sparkline	Inline sparkline trend chart
Scrollbar + ScrollbarState	Attach scrollbars to any widget
Tabs	Tabbed navigation bar
Clear	Clears a rectangular area (use under popups)

Quick examples:

# Gauge
Gauge().percent(75).label("CPU 75%").style(Style().fg(Color.green()))

# Navigable list
list_state = ListState()
list_state.select(0)
items = [ListItem(s) for s in ["Alpha", "Beta", "Gamma"]]
frame.render_stateful_list(
    List(items).highlight_style(Style().fg(Color.yellow()).bold()),
    area, list_state,
)

# Table
header = Row.from_strings(["Name", "Status", "Uptime"])
rows = [Row.from_strings(["nginx", "✓ running", "14d"]), ...]
frame.render_stateful_table(
    Table(rows, [Constraint.fill(1)] * 3, header=header),
    area, table_state,
)

# Sparkline
Sparkline().data([10, 40, 20, 80, 55, 90]).max(100).style(Style().fg(Color.cyan()))

# Tabs
Tabs(["Overview", "Logs", "Config"]).select(1).highlight_style(Style().fg(Color.yellow()))

Third-Party Widgets

Widget	Crate	Description
Popup / PopupState	tui-popup	Centered or draggable popups
TextArea	tui-textarea	Full multi-line editor (Emacs keybindings, undo/redo)
ScrollView / ScrollViewState	tui-scrollview	Scrollable virtual viewport
QrCodeWidget	tui-qrcode	QR codes rendered in Unicode block characters
Monthly / CalendarDate	ratatui widget-calendar	Monthly calendar with event styling
BarGraph	tui-bar-graph	Gradient braille/block bar graphs
Tree / TreeState	tui-tree-widget	Collapsible tree view
TuiLoggerWidget	tui-logger	Live scrolling log viewer
ImageWidget / ImagePicker	ratatui-image	Terminal image rendering
Canvas	ratatui	Low-level line/point/rect drawing
Map	ratatui	World map widget
Button	built-in	Focus-aware interactive button

Third-party widget examples:

# Popup (stateful / draggable)
from pyratatui import Popup, PopupState, Style, Color

popup = Popup("Press any key to dismiss").title("Info").style(Style().bg(Color.blue()))
state = PopupState()
frame.render_stateful_popup(popup, frame.area, state)

# TextArea (multi-line editor)
from pyratatui import TextArea, Terminal

ta = TextArea.from_lines(["Hello", "World"])
ta.set_placeholder_text("Start typing…")
# inside loop:
frame.render_textarea(ta, area)
# forward key events:
ta.input_key(ev.code, ev.ctrl, ev.alt, ev.shift)

# QR Code
from pyratatui import QrCodeWidget, QrColors
qr = QrCodeWidget("https://ratatui.rs").colors(QrColors.Inverted)
frame.render_qrcode(qr, area)

# Calendar
from pyratatui import CalendarDate, CalendarEventStore, Monthly
store = CalendarEventStore.today_highlighted(Style().fg(Color.green()).bold())
cal = (Monthly(CalendarDate.today(), store)
       .show_month_header(Style().bold())
       .show_weekdays_header(Style().italic()))
frame.render_widget(cal, area)

# Gradient bar graph
from pyratatui import BarGraph, BarGraphStyle, BarColorMode
graph = (BarGraph([0.1, 0.4, 0.9, 0.6, 0.8])
         .bar_style(BarGraphStyle.Braille)
         .color_mode(BarColorMode.VerticalGradient)
         .gradient("turbo"))
frame.render_widget(graph, area)

# Markdown rendering
from pyratatui import markdown_to_text, Paragraph
text = markdown_to_text("# Hello\n\n**bold** _italic_ `code`")
frame.render_widget(Paragraph(text), area)

# Tree widget
from pyratatui import Tree, TreeItem, TreeState
items = [
    TreeItem("src", [TreeItem("main.rs"), TreeItem("lib.rs")]),
    TreeItem("Cargo.toml"),
]
tree = Tree(items).block(Block().bordered().title(" Files "))
state = TreeState()
frame.render_stateful_tree(tree, area, state)

---

TachyonFX Effects

PyRatatui ships the full tachyonfx effects engine. Effects are post-render transforms that mutate the frame buffer — always apply them after rendering your widgets.

Effect Types

Effect	Description
Effect.fade_from_fg(color, ms)	Fade text from a color into its natural color
Effect.fade_to_fg(color, ms)	Fade text out to a flat color
Effect.fade_from(bg, fg, ms)	Fade both background and foreground from color
Effect.fade_to(bg, fg, ms)	Fade both background and foreground to color
Effect.coalesce(ms)	Characters materialize in from random positions
Effect.dissolve(ms)	Characters scatter and dissolve
Effect.slide_in(direction, ms)	Slide content in from an edge
Effect.slide_out(direction, ms)	Slide content out to an edge
Effect.sweep_in(dir, span, grad, color, ms)	Gradient sweep reveal
Effect.sweep_out(dir, span, grad, color, ms)	Gradient sweep hide
Effect.sequence(effects)	Run effects one after another
Effect.parallel(effects)	Run effects simultaneously
Effect.sleep(ms)	Delay before next effect in a sequence
Effect.repeat(effect, times=-1)	Loop an effect (−1 = forever)
Effect.ping_pong(effect)	Play an effect forward then backward
Effect.never_complete(effect)	Keep an effect alive indefinitely

Interpolations

Interpolation.Linear, QuadIn/Out/InOut, CubicIn/Out/InOut, SineIn/Out/InOut, CircIn/Out/InOut, ExpoIn/Out/InOut, ElasticIn/Out, BounceIn/Out/BounceInOut, BackIn/Out/BackInOut

Basic Effect Usage

import time
from pyratatui import Effect, EffectManager, Interpolation, Color, Terminal, Paragraph

mgr = EffectManager()
mgr.add(Effect.fade_from_fg(Color.black(), 1000, Interpolation.SineOut))
last = time.monotonic()

with Terminal() as term:
    while not (ev := term.poll_event(timeout_ms=16)) or ev.code != "q":
        now = time.monotonic()
        elapsed_ms = int((now - last) * 1000)
        last = now

        def ui(frame, _mgr=mgr, _ms=elapsed_ms):
            # Step 1 — render widgets
            frame.render_widget(Paragraph.from_string("Fading in…"), frame.area)
            # Step 2 — apply effects to the same buffer
            frame.apply_effect_manager(_mgr, _ms, frame.area)

        term.draw(ui)

Effect DSL

Compile tachyonfx expressions at runtime — perfect for config-driven or user-customisable animations:

from pyratatui import compile_effect, EffectManager

# DSL mirrors the Rust / tachyonfx expression syntax
effect = compile_effect("fx::coalesce(500)")
effect = compile_effect("fx::dissolve((800, BounceOut))")
effect = compile_effect("fx::fade_from_fg(Color::Black, (600, QuadOut))")
effect = compile_effect("fx::sweep_in(LeftToRight, 10, 5, Color::Black, (700, SineOut))")

mgr = EffectManager()
mgr.add(effect)

Cell Filters

Target effects at specific cells:

from pyratatui import CellFilter, Effect, Color

effect = Effect.fade_from_fg(Color.black(), 800)
effect.with_filter(CellFilter.text())                           # text cells only
effect.with_filter(CellFilter.inner(horizontal=1, vertical=1)) # inner area
effect.with_filter(CellFilter.fg_color(Color.cyan()))          # specific fg color
effect.with_filter(CellFilter.any_of([CellFilter.text(), CellFilter.all()]))

---

Async & Reactive UIs

Use AsyncTerminal to combine rendering with background asyncio tasks:

import asyncio
from pyratatui import AsyncTerminal, Gauge, Block, Style, Color

state = {"progress": 0}

async def background_worker():
    while state["progress"] < 100:
        await asyncio.sleep(0.1)
        state["progress"] += 2

async def main():
    worker = asyncio.create_task(background_worker())

    async with AsyncTerminal() as term:
        async for ev in term.events(fps=30):
            pct = state["progress"]

            def ui(frame, _pct=pct):
                frame.render_widget(
                    Gauge()
                    .percent(_pct)
                    .label(f"Loading… {_pct}%")
                    .style(Style().fg(Color.green()))
                    .block(Block().bordered().title("Progress")),
                    frame.area,
                )

            term.draw(ui)

            if ev and ev.code == "q":
                break
            if pct >= 100:
                break

    worker.cancel()

asyncio.run(main())

AsyncTerminal.events() Parameters

async for ev in term.events(fps=30.0, stop_on_quit=True):
    # ev is KeyEvent | None
    # None emitted each tick (use for animations / periodic updates)
    # stop_on_quit=True exits the loop automatically on "q"

run_app / run_app_async Helpers

For simpler apps that don't need manual task management:

from pyratatui import run_app, run_app_async, Paragraph

# Synchronous
run_app(lambda frame: frame.render_widget(
    Paragraph.from_string("Hello!"), frame.area
))

# Asynchronous
import asyncio

async def main():
    tick = 0
    def ui(frame):
        nonlocal tick
        frame.render_widget(Paragraph.from_string(f"Tick: {tick}"), frame.area)
        tick += 1
    await run_app_async(ui, fps=30, on_key=lambda ev: ev.code == "q")

asyncio.run(main())

---

CLI Tool

PyRatatui ships a pyratatui CLI for project scaffolding and version inspection.

Usage: pyratatui [COMMAND]

Commands:
  init     Create a new PyRatatui project scaffold
  version  Show PyRatatui version

Options:
  --help   Show help message

pyratatui init

pyratatui init my_tui_app [--verbose]

Creates a ready-to-run project:

my_tui_app/
├── main.py           # runnable hello world starter
├── requirements.txt  # pyratatui dependency
└── README.md         # project docs

cd my_tui_app
pip install -r requirements.txt
python main.py

pyratatui version

pyratatui version
# PyRatatui 0.2.2

---

API Reference

Terminal

class Terminal:
    def __enter__(self) -> Terminal
    def __exit__(self, ...) -> bool
    def draw(self, draw_fn: Callable[[Frame], None]) -> None
    def poll_event(self, timeout_ms: int = 0) -> KeyEvent | None
    def area(self) -> Rect
    def clear(self) -> None
    def hide_cursor(self) -> None
    def show_cursor(self) -> None
    def restore(self) -> None

AsyncTerminal

class AsyncTerminal:
    async def __aenter__(self) -> AsyncTerminal
    async def __aexit__(self, ...) -> bool
    def draw(self, draw_fn: Callable[[Frame], None]) -> None
    async def poll_event(self, timeout_ms: int = 50) -> KeyEvent | None
    async def events(self, fps: float = 30.0, *, stop_on_quit: bool = True) -> AsyncIterator[KeyEvent | None]
    def area(self) -> Rect
    def clear(self) -> None
    def hide_cursor(self) -> None
    def show_cursor(self) -> None

Frame

class Frame:
    @property
    def area(self) -> Rect

    # Standard widgets (stateless)
    def render_widget(self, widget: object, area: Rect) -> None

    # Stateful widgets
    def render_stateful_list(self, widget: List, area: Rect, state: ListState) -> None
    def render_stateful_table(self, widget: Table, area: Rect, state: TableState) -> None
    def render_stateful_scrollbar(self, widget: Scrollbar, area: Rect, state: ScrollbarState) -> None

    # Popups
    def render_popup(self, popup: Popup, area: Rect) -> None
    def render_stateful_popup(self, popup: Popup, area: Rect, state: PopupState) -> None

    # Text editor
    def render_textarea(self, ta: TextArea, area: Rect) -> None

    # Scroll view
    def render_stateful_scrollview(self, sv: ScrollView, area: Rect, state: ScrollViewState) -> None

    # QR code
    def render_qrcode(self, qr: QrCodeWidget, area: Rect) -> None

    # Effects
    def apply_effect(self, effect: Effect, elapsed_ms: int, area: Rect) -> None
    def apply_effect_manager(self, manager: EffectManager, elapsed_ms: int, area: Rect) -> None

    # Prompts
    def render_text_prompt(self, prompt: TextPrompt, area: Rect, state: TextState) -> None
    def render_password_prompt(self, prompt: PasswordPrompt, area: Rect, state: TextState) -> None

Layout & Geometry

class Layout:
    def constraints(self, constraints: list[Constraint]) -> Layout
    def direction(self, direction: Direction) -> Layout
    def margin(self, margin: int) -> Layout
    def spacing(self, spacing: int) -> Layout
    def flex_mode(self, mode: str) -> Layout
    def split(self, area: Rect) -> list[Rect]

class Rect:
    x: int;  y: int;  width: int;  height: int
    right: int;  bottom: int;  left: int;  top: int
    def area(self) -> int
    def inner(self, horizontal: int = 1, vertical: int = 1) -> Rect
    def contains(self, other: Rect) -> bool
    def intersection(self, other: Rect) -> Rect | None
    def union(self, other: Rect) -> Rect

Style

class Style:
    def fg(self, color: Color) -> Style
    def bg(self, color: Color) -> Style
    def bold(self) -> Style
    def italic(self) -> Style
    def underlined(self) -> Style
    def dim(self) -> Style
    def reversed(self) -> Style
    def hidden(self) -> Style
    def crossed_out(self) -> Style
    def slow_blink(self) -> Style
    def rapid_blink(self) -> Style
    def patch(self, other: Style) -> Style
    def add_modifier(self, modifier: Modifier) -> Style
    def remove_modifier(self, modifier: Modifier) -> Style

Block

class Block:
    def title(self, title: str) -> Block
    def title_bottom(self, title: str) -> Block
    def bordered(self) -> Block                          # all four borders
    def borders(self, top, right, bottom, left) -> Block
    def border_type(self, bt: BorderType) -> Block       # Plain | Rounded | Double | Thick
    def style(self, style: Style) -> Block
    def border_style(self, style: Style) -> Block
    def title_style(self, style: Style) -> Block
    def padding(self, left, right, top, bottom) -> Block
    def title_alignment(self, alignment: str) -> Block

Prompts

# Blocking single-line text prompt (runs its own event loop)
value: str | None = prompt_text("Enter your name: ")
password: str | None = prompt_password("Password: ")

# Stateful inline prompts
state = TextState()
frame.render_text_prompt(TextPrompt("Search: "), area, state)
if state.is_complete():
    print(state.value())

Exceptions

Exception	When raised
PyratatuiError	Base exception for all library errors
BackendError	Terminal backend failure
LayoutError	Invalid layout constraint or split
RenderError	Widget render failure
AsyncError	Async / thread misuse
StyleError	Invalid style combination

---

Examples

The examples/ directory contains 33 standalone, runnable scripts. Run any of them directly:

python examples/01_hello_world.py
python examples/07_async_reactive.py
python examples/08_effects_fade.py

#	File	Demonstrates
01	01_hello_world.py	Terminal, Paragraph, Block, Style, Color
02	02_layout.py	Layout, Constraint, Direction, nested splits
03	03_styled_text.py	Span, Line, Text, Modifier
04	04_list_navigation.py	List, ListState, keyboard navigation
05	05_progress_bar.py	Gauge, LineGauge, time-based animation
06	06_table_dynamic.py	Table, Row, Cell, TableState
07	07_async_reactive.py	AsyncTerminal, live background metrics
08	08_effects_fade.py	Effect.fade_from_fg, EffectManager
09	09_effects_dsl.py	compile_effect(), DSL syntax
10	10_full_app.py	Full production app: tabs, async, effects
11	11_popup_basic.py	Popup — basic centered popup
12	12_popup_stateful.py	PopupState — draggable popup
13	13_popup_scrollable.py	KnownSizeWrapper — scrollable popup content
14	14_textarea_basic.py	TextArea — basic multi-line editor
15	15_textarea_advanced.py	TextArea — modal vim-style editing
16	16_scrollview.py	ScrollView, ScrollViewState
17	17_qrcode.py	QrCodeWidget, QrColors
18	18_async_progress.py	Async live progress with asyncio.Task
19	19_effects_glitch.py	dissolve / coalesce glitch animation
20	20_effects_matrix.py	sweep_in / sweep_out matrix-style
21	21_prompt_confirm.py	Yes/No confirmation prompt
22	22_prompt_select.py	Arrow-key selection menu
23	23_prompt_text.py	TextPrompt, TextState
24	24_dashboard.py	Full dashboard: Tabs, BarChart, Sparkline
25	25_calendar.py	Monthly, CalendarDate, CalendarEventStore
26	26_bar_graph.py	BarGraph, gradient styles
27	27_tree_widget.py	Tree, TreeState, collapsible nodes
28	28_markdown_renderer.py	markdown_to_text()
29	29_logger_demo.py	TuiLoggerWidget, init_logger
30	30_image_view.py	ImagePicker, ImageWidget, ImageState
31	31_canvas_drawing.py	Canvas — lines, points, rectangles
32	32_map_widget.py	Map, MapResolution
33	33_button_widget.py	Button — focus state, key handling

---

Building from Source

Prerequisites

# 1. Install Rust
curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh
source "$HOME/.cargo/env"
rustup update stable

# 2. Install Maturin
pip install maturin

Development Build

git clone https://github.com/pyratatui/pyratatui.git
cd pyratatui

# Editable install — fast compile, slower runtime
maturin develop

# Release build — full Rust optimizations (recommended for benchmarking/use)
maturin develop --release

After changing Rust source files, re-run maturin develop to rebuild the extension. Python files in python/pyratatui/ are reflected immediately with no rebuild.

Build a Distributable Wheel

maturin build --release
# Wheel output: target/wheels/pyratatui-*.whl
pip install target/wheels/pyratatui-*.whl

Format & Lint

# Linux / macOS
./scripts/format.sh

# Windows
./scripts/format.ps1

# Python only (ruff + mypy)
ruff check .
ruff format .
mypy python/

Tests

# Python tests (pytest)
pytest tests/python/

# Rust unit tests
cargo test

Docker (source build)

FROM python:3.12-slim
RUN curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y
ENV PATH="/root/.cargo/bin:${PATH}"
RUN pip install pyratatui

---

Platform Notes

Windows

Requires Windows Terminal or VS Code integrated terminal (Windows 10 build 1903+ for VT sequence support). The classic cmd.exe may not render all Unicode characters correctly.

macOS

Default Terminal.app works but has limited colour support. iTerm2 or Alacritty are recommended for true-colour and full Unicode rendering.

Linux

Any modern terminal emulator works. Verify true-colour support:

echo $COLORTERM   # should output "truecolor" or "24bit"

Troubleshooting

ModuleNotFoundError: No module named 'pyratatui._pyratatui' The native extension was not compiled. Run maturin develop --release or reinstall via pip install --force-reinstall pyratatui.

PanicException: pyratatui::terminal::Terminal is unsendable You called a Terminal method from a thread-pool thread. Use AsyncTerminal instead.

Garbage on screen after Ctrl-C Always use Terminal as a context manager. For emergency recovery: reset or stty sane in your shell.

ValueError: Invalid date CalendarDate.from_ymd(y, m, d) raises ValueError for invalid dates (e.g. Feb 30). Validate inputs first.

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Contributing

Contributions are welcome! Here's how to get started:

1. Fork the repository on GitHub
2. Clone your fork and create a branch: git checkout -b feature/my-feature
3. Install dev dependencies:

   pip install -e ".[dev]"
   maturin develop
   

4. Make your changes — Rust source lives in src/, Python in python/pyratatui/
5. Run tests and linters:

   pytest tests/python/
   cargo test
   ruff check . && ruff format .
   mypy python/
   

6. Open a Pull Request against main

Please follow the existing code style. For significant changes, open an issue first to discuss your approach.

Documentation

Docs are built with MkDocs Material:

pip install -e ".[docs]"
mkdocs serve          # local preview at http://localhost:8000
mkdocs build          # static site in site/

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License

MIT © 2025 PyRatatui contributors — see LICENSE for full text.

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Built with 🦀 ratatui · ⚡ tachyonfx · 🐍 PyO3

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