Capture value of Dropdown Selection everytime it changes

[c0pper]

Hi how do I capture the value of the item selected in the Dropdown Selection so that the capturing variable is updated each time the selection changes?

Expected:
In the example I tried below I'd like to print the Dropdown Selection value each time i change it in the browser

Actual result:
the print happens only once when the program is started and never more

from nicegui import ui

def set_allow_moving(val):
    return val.value

select1 = ui.select([1, 2, 3], value=1, on_change=set_allow_moving)

print(set_allow_moving(select1))

ui.run()

[falkoschindler]

If you want to print the value whenever it changes, you should do it in the change event handler:

def set_allow_moving(event):
    print(event.value)

ui.select([1, 2, 3], value=1, on_change=set_allow_moving)

[c0pper]

Thanks. How would I go about capturing the value in a global variable instead of printing it?
Keeping in mind that such variable should still be updated on every change of selection.

[falkoschindler]

You can assign global variables like this:

select_value = 1

def set_allow_moving(event):
    global select_value
    select_value = event.value

ui.select([1, 2, 3], value=select_value, on_change=set_allow_moving)

See #268 (reply in thread) for alternative implementations for updating global state.