Flexx: Python toolkit for creating graphical user interfaces

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Flexx: Python toolkit for creating graphical user interfaces

Post by hackinformer » Wed Sep 09, 2015 6:18 pm

Flexx is a pure Python toolkit for creating graphical user interfaces (GUI's), that uses web technology for its rendering. You can use Flexx to create desktop applications, web applications, and (if designed well) export an app to a standalone HTML document. It also works in the Jupyter notebook.

Being pure Python and cross platform, it should work anywhere where there's Python and a browser. To run apps in desktop-mode, we recommend having Firefox installed.

Flexx has a modular design, consisting of a few subpackages, which can also be used by themselves:

ui - the widgets
app - the event loop and server
react - reactive programming (how information flows through your program)
pyscript - Python to JavaScript transpiler
webruntime - to launch a runtime

Working code example::

from flexx import app, ui, react

class Example(ui.Widget):

def init(self):
self.count = 0
with ui.HBox():
self.button = ui.Button(text='Click me', flex=0)
self.label = ui.Label(flex=1)

def _handle_click(self, down):
if down:
self.count += 1
self.label.text('clicked %i times' % self.count)

main = app.launch(Example)
Current status

Flexx is still very much a work in progress. Please don't go use it just yet for anything serious. The public API can change without notice. However, we're interested in feedback, so we invite you to play with it!

Getting started

clone the repo
put the repo dir in your PYTHONPATH
python setup.py install
run the examples
Demo server

There is an Amazon instance running some demos on (unless I turned it off for testing, etc.).


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