Persistent Input (pin)

[liaoshian]

I found out that the page regarding Persistent Input (https://pywebio.readthedocs.io/en/latest/pin.html) was so poorly documented and the importance of using persistent input greatly underestimated.
One example is the BMI calculator demo, I'd like to modify it into a reusable calculator that whenever user enters his weight and height and hit return, the output area shows the results without destroying the input controls.
I tried to use Persistent Input but got frustrated, and finally retreated to use a while True loop to achieve this. It works but somehow ugly.
I'd suggest that add a parameter like "persistent=True" in normal input widgets instead of creating a whole branch of "pin" widgets that are so difficult to use.

[wang0618]

The pin module and the input module represent two total different programming styles. The pin is declarative, and you need write much code in callbacks. The input functions from input module is blocking, it's more strightforward. You can use it just like you are writing a terminal script.

[liaoshian]

The pin demo of BMI Calculator looks good enough, I do think there are not enough demos even though the package is so far the greatest pythonic web GUI framework I've seen so far. I've been using PySimpleGUI for a while and its web version is so lousy, that I'm stuck with Windows forms. I'm hoping to move to PyWebIO for user forms from now on.

[luxuncang]

You can try declarative PyWebIo：TypeWebIo

[liaoshian]

You can try declarative PyWebIo：TypeWebIo

Looks like it's under heavy development and not yet working (at least not when I tried on Jupyter Notebook).