You need to call your function.

def hello_function(name):
    print(name)
    return name


hello_function("You")  # Add this line

Python 2 died 998 days ago on 1/1/2020 so please stick with Python 3.

In Examples/User Interface/Calculator.py the button_tapped() function gets the values of label1 and label2.

For your code, you will need to use int(sender.superview['label1']) to get an integer.

+1 @JonB Ideally, actions should be super simple and run quickly. Move complexity to other parts of your code.

http://omz-software.com/pythonista/docs/ios/ui.html#about-actions-and-delegates

state is a weak name because it does not make clear what it is the state of.

is_playing would be a more self-documenting name.

Cool! A nice opportunity for itertools.cycle()...

from itertools import cycle

import ui

button_image = cycle(ui.Image.named(name) for name in ('iob:pause_32','iob:play_32'))


def button_action(sender):
    sender.image = next(button_image)


ui.Button(action=button_action, bg_color='lightgray', image=next(button_image)).present()

sender.image # No space and lowercase i

https://omz-software.com/pythonista/docs/ios/ui.html#button

Looking at Languages at https://github.com/ray-project/ray
Python 69.3%
C++ 21.8%
Java 4.3%
Starlark 1.2%
TypeScript 1.1%
Cython 0.8%
Other 1.5%

Pythonista is great a pure-Python content but the other languages are a problem.

https://code.visualstudio.com/docs/editor/intellisense
https://www.youtube.com/watch?v=lSPHucggmLo

https://holzschu.github.io/a-Shell_iOS