pyweft-ui

Ready-made controls for PyWeft: buttons, form fields, cards, layout, tabs, tables, dialogs, toasts and more, styled and accessible out of the box. Build a good-looking app in Python without writing HTML or CSS.

<template>
  <ui.Theme>
    <ui.AppShell title="Orders">
      <ui.Card title="New order">
        <ui.Column>
          <ui.TextField label="Customer" @bind="customer" required="true" />
          <ui.Select label="Size" options="Small, Medium, Large" @bind="size" />
          <ui.Switch label="Express delivery" @bind="express" />
        </ui.Column>
        <Fill name="footer">
          <ui.Button variant="ghost" @click="reset">Reset</ui.Button>
          <ui.Button variant="primary" icon="send" :loading="saving" @click="submit">
            Place order
          </ui.Button>
        </Fill>
      </ui.Card>
    </ui.AppShell>
  </ui.Theme>
</template>

<code>
from pyweft_ui import ui

customer: str = ""
size: str = "Medium"
express: bool = False
saving: bool = False

def reset(self):
    self.customer, self.size, self.express = "", "Medium", False

async def submit(self):
    ...
</code>

New to the toolkit? Read the guide: page layout, forms with validation, dialogs, themes and building your own components, with complete examples. This README is the compact reference.

Install

It isn't on PyPI yet, so install it from GitHub, into the same environment as PyWeft itself (see PyWeft's quick start):

uv add "pyweft-ui @ git+https://github.com/prassanthn/PyWeft.git#subdirectory=packages/pyweft-ui"

With pip:

pip install "git+https://github.com/prassanthn/PyWeft.git#subdirectory=packages/pyweft-ui"

Then add "pyweft-ui" to the dependencies list in your app's own pyproject.toml (myapp/pyproject.toml), import it in a component's code block with from pyweft_ui import ui, and use the controls as <ui.Name>. pyweft run and pyweft build see that it is installed locally and send it to the browser for you.

Controls

Every control is a PyWeft component: attributes set its fields, @bind connects it to a field of yours, and attributes it doesn't have, such as class, style, id and aria-*, go onto its outer element. Plain attribute values are converted to each field's type, so cols="3" is the number 3 and disabled="true" is True.

Layout

Gaps take none, xs, sm, md, lg, xl, or any CSS length.

Form fields

All have label, hint, error, required, disabled, name, and take @bind.

options can be a comma-separated string ("Small, Medium, Large"), a list of values, a list of (value, label) pairs or a list of {"value": ..., "label": ...} dicts. The bound field gets the value itself, so [(1, "One"), (2, "Two")] binds an int.

Data and navigation

Table columns are field names ("id, customer"), (field, heading) pairs, or dicts with key and optionally label, format (",.2f" or a function), align and sortable. Left out, they come from the first row. sort="-total" starts sorted by total, largest first.

Actions and feedback

Toasts

from pyweft_ui import toast, clear_toasts

toast("Saved")                                   # info, closes after 4 s
toast("Payment failed", "danger", title="Oops")  # kind: info, success, warning, danger
toast("Archived", action="Undo", on_action=undo) # a button that calls undo()
note = toast("Uploading…", duration=None)        # stays until note.close()

Call it from any handler or task; the page's <ui.Toaster /> shows it.

Theming

<ui.Theme mode="auto" primary="#0f766e" radius="12px">
  ...
</ui.Theme>

Every colour is a CSS variable (--ui-primary, --ui-text, --ui-surface, --ui-border, --ui-danger ...), so you can also set them in your own CSS.

The gallery

gallery/ is a PyWeft app showing every control. From the PyWeft repository:

uv run pyweft run packages/pyweft-ui/gallery