PyTermGUI 0.1.3

A simple and robust terminal UI library, written in Python.

A simple yet powerful TUI framework for your Python (3.9+) applications

pip3 install pytermgui

Core principles

PTG was written with some core ideas in mind, such as:

• Pythonic syntax
• Flexible systems
• Extensibility by design
• Readable, reproducible code

from pytermgui import Container, Label
root = Container() + Label("Clean code is [bold]cool[/bold]!")
root.print()

What we provide

• Terminal mouse support
• A fully flegded WindowManager in the terminal
• A cross-platform getch function with key translations
• An interface to most terminal functionality
• A custom markup language with definable tags & macros inspired by Rich
• Tokenizer & optimizer methods for ANSI-sequence strings
• A robust, extensible and customizable Widget class
• helpful CLI tools (ptg --help)
• Helpful example files covering most of the library

import sys
from pytermgui import WindowManager, Window, Label, Button

manager = WindowManager()
window = (
    Window()
    + Label("[210 bold]My first Window!")
    + Label()
    + Label("[157]Try resizing the window by dragging the right border")
    + Label("[157]Or drag the top border to move the window")
    + Label("[193 bold]Alt-Tab[/bold 157] cycles windows")
    + Label("[193 bold]CTRL_C[/bold 157] exits the program")
    + Label()
    + Button("New window", onclick=lambda *_: manager.add(window.copy().center()))
    + Button("Close current", onclick=lambda _, button: button.parent.manager.close(button.parent))
    + Button("Exit program", onclick=lambda *_: sys.exit(0))
)

window.min_width = 55
manager.add(window)
manager.run()

Example to get started with

from pytermgui import Container, Label, InputField, MarkupFormatter, getch, alt_buffer, boxes

border_corner_markup = MarkupFormatter("[60 bold]{item}")
Container.set_style("border", border_corner_markup)
Container.set_style("corner", border_corner_markup)
boxes.SINGLE.set_chars_of(Container)

root = Container()
root.forced_width = 70

boxes.DOUBLE_TOP.set_chars_of(root)
root += Label("[210 bold] Welcome to [italic]PyTermGUI!", align=Label.ALIGN_LEFT)
root += Label()

field = InputField("Enter something!")
field.set_style("value", MarkupFormatter("[italic 72]{item}"))
field.set_style("cursor", MarkupFormatter("[@72]{item}"))

field_container = Container(vert_align=Container.VERT_ALIGN_TOP) + field
field_container.forced_height = 7
root += field_container

root += Label("[245 italic]> Press CTRL_C to exit...", align=Label.ALIGN_RIGHT)

root.focus()

with alt_buffer(cursor=False):
    root.center()
    root.print()

    while True:
        key = getch(interrupts=False)

        if key == chr(3):
            break

        field.send(key)
        root.center()
        root.print()

print("Goodbye!")

Some screenshots

Why the long nose version requirement?

PyTermGUI makes heavy use of the typing module, which in Python 3.9 saw the inclusion of container parameterizing, allowing the use of list[str] instead of List[str].

The previous method is now deprecated, and there isn't any nice way of supporting both forever. As such, the use of the new syntax makes Python 3.8x and lower raise SyntaxError.

There isn't really much to help this issue, and its good practice to stay on the most recent release regardless.

from pytermgui import Container, Label, boxes, auto
boxes.EMPTY_VERTICAL.set_chars_of(Container)

root = Container()
root += Label("[246 italic bold] a guide on the python version you should use")

root += auto({
    "[157]python >3.9": "[157]good",
    "[210]python <3.8": "[210]bad",
})
root.print()

Documentation

As the project is in its infancy, dedicated documentation is not yet available.

If you are interested in help about anything the module provides, you can read its docstring:

python3 -c "help(<name>)"

However, proper documentation is coming soon.