pyinklib 0.0.9

Build terminal UIs with Python using React-like components and flexbox layout. A 1:1 port of Ink.

PyInk

Build terminal UIs with Python using React-like components and flexbox layout.

A 1:1 Python port of Ink.

Install

pip install pyinklib

Or with uv:

uv add pyinklib

Usage

from pyink import component, render, Box, Text
from pyink.hooks import use_state, use_input, use_app

@component
def counter():
    count, set_count = use_state(0)
    app = use_app()

    def handle_input(input_str, key):
        if key.up_arrow:
            set_count(lambda c: c + 1)
        elif key.down_arrow:
            set_count(lambda c: max(0, c - 1))
        elif input_str == "q":
            app.exit()

    use_input(handle_input)

    return Box(
        Text(f"Counter: {count}", color="cyan", bold=True),
        Box(
            Text("Up/Down to change, q to quit", dim_color=True),
            margin_top=1,
        ),
        flex_direction="column",
        padding=1,
        border_style="round",
    )

render(counter())

Components

Box

Flexbox container, like <div>. Supports all flexbox props:

Box(
    *children,
    flex_direction="row",       # row | column | row-reverse | column-reverse
    justify_content="center",   # flex-start | center | flex-end | space-between | space-around | space-evenly
    align_items="stretch",      # flex-start | center | flex-end | stretch | baseline
    padding=1,                  # padding on all sides
    margin_top=1,               # individual margin
    border_style="round",       # single | double | round | bold | classic
    border_color="green",       # named color, hex, or rgb
    width=40,
    height=10,
    overflow="hidden",
)

Text

Text with styling:

Text("Hello", color="green", bold=True, italic=True, underline=True, strikethrough=True, dim_color=True, inverse=True)

Spacer

Fills available space (like flex: 1):

Box(Text("Left"), Spacer(), Text("Right"), flex_direction="row")

Static

Render items once (for logs, completed tasks):

Static(items=completed, render_item=lambda item, i: Text(f"Done: {item}"))

Transform

Transform text output per line:

Transform(Text("hello"), transform=lambda text, idx: text.upper())

Hooks

Hook	Description
use_state(initial)	Local state, returns (value, setter)
use_effect(fn, deps)	Side effects with cleanup
use_input(handler)	Keyboard input
use_app()	App lifecycle (exit())
use_focus()	Tab-based focus
use_focus_manager()	Programmatic focus control
use_animation(interval=100)	Frame animation
use_window_size()	Terminal dimensions
use_ref(initial)	Mutable ref
use_memo(fn, deps)	Memoized value
use_paste(handler)	Paste events
use_stdout() / use_stderr() / use_stdin()	Stream access
use_cursor()	Cursor position
use_box_metrics(ref)	Element measurements
use_is_screen_reader_enabled()	Accessibility detection

Examples

pip install pyinklib

python -m pyink.examples.counter            # Auto-incrementing counter
python -m pyink.examples.use_input          # Move a face with arrow keys
python -m pyink.examples.chat               # Type messages + Enter
python -m pyink.examples.select_input       # Arrow key selection list
python -m pyink.examples.dashboard          # Animated multi-panel dashboard
python -m pyink.examples.use_animation      # Unicorn animation
python -m pyink.examples.borders            # All 8 border styles
python -m pyink.examples.border_backgrounds # Per-edge border colors
python -m pyink.examples.box_backgrounds    # Background colors
python -m pyink.examples.use_focus          # Tab focus navigation
python -m pyink.examples.use_focus_with_id  # Programmatic focus by ID
python -m pyink.examples.focus              # Focus with visual indicators
python -m pyink.examples.table              # Data table with columns
python -m pyink.examples.justify_content    # All justify-content modes
python -m pyink.examples.terminal_resize    # Live terminal size display
python -m pyink.examples.use_stdout         # Terminal dimensions
python -m pyink.examples.alternate_screen   # Snake game (alt screen)
python -m pyink.examples.hello              # Hello World

Acknowledgements

PyInk is a Python port of Ink by Vadim Demedes. All credit for the architecture and design goes to the Ink team.

License

MIT