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I would like to get the button title of my script to decide with math operation do. But I have problem with parameter, data gotten from sender (str, int).

I check an answer given to newbie (I did not remember exactly the user) an adapt it, but is not working properly. Here is the code.

Is a simply math app for my kids. In developing of course.

Thanks

import ui
#import console

texto1 = ''

mains=ui.View(frame=(10,10,10,10), background_color='#008000', name='Math for Fun')

mains.present('view')

controls1=ui.View(frame=(0,0,410,200), background_color='#e6ec5f', name='controls1')

def button_tapped(sender):
    #if  button_tapped == b_top1.title('SUM'):
    #itexto1 = 'Hello World'
    texto1 = sender.title
    #else:
    #texto1 = str(300)  
    return texto1

b_top1 = ui.Button()
b_top1.frame = (20,80,80,50)
b_top1.title = 'SUM'
b_top1.font = ('<System-Bold>', 20)
b_top1.background_color = ('#07b2cc')
b_top1.border_width = 2
b_top1.corner_radius = 5
b_top1.action = button_tapped

b_top2 = ui.Button()
b_top2.frame = (115,80,80,50)
b_top2.title = 'SUBS'
b_top2.font = ('<System-Bold>', 20)
b_top2.background_color = '#ff8909'
b_top2.border_width = 2
b_top2.corner_radius = 5
b_top1.action = button_tapped

b_top3 = ui.Button()
b_top3.frame = (215,80,80,50)
b_top3.title = 'MULT'
b_top3.font = ('<System-Bold>', 20)
b_top3.background_color = '#07de1a'
b_top3.border_width = 2
b_top3.corner_radius = 5
b_top1.action = button_tapped

b_top4 = ui.Button()
b_top4.frame = (310,80,80,50)
b_top4.title = 'DIV'
b_top4.font = ('<System-Bold>', 20)
b_top4.background_color = '#ffd12b'
b_top4.border_width = 2
b_top4.corner_radius = 5
b_top1.action = button_tapped

lb1 = ui.Label(name = 'Label1', bg_color = 'yellow', frame =(80,20,250,50))
lb1.border_color = 'black'
lb1.border_width = 1
lb1.flex = 'RB'
lb1.alignment=1
lb1.text = 'VAMOS A JUGAR MATEMATICAS'

txt_field1 = ui.TextField()
txt_field1.frame = (150,145,100,50)
txt_field1.border = (50,20,50,50)
txt_field1.bg_color = (.9, .98, 1.0)
txt_field1.text = button_tapped()


mains.add_subview(controls1)
controls1.add_subview(b_top1)
controls1.add_subview(b_top2)
controls1.add_subview(b_top3)
controls1.add_subview(b_top4)
controls1.add_subview(lb1)
controls1.add_subview(txt_field1)

@sendog3c could you please provide a bit more information about your problem?

But I have problem with parameter, data gotten from sender (str, int).

What exactly do you mean? sender.title should always be a str. If you want to convert a str to an int, use int(text_here). If you want to convert a int to a str, use str(int_here).

def button_tapped(sender):
    #if  button_tapped == b_top1.title('SUM'):
    #itexto1 = 'Hello World'
    texto1 = sender.title
    #else:
    #texto1 = str(300)  
    return texto1

You can not return something from a callback. Instead, do the operation directly in the callback.
An example:

def button_tapped(sender):
    a = ...  # value for a here
    b = ...  # value for b here
    action = sender.title
    if action == "SUM":
        result = a + b
    # .. other operations
    txt_field1.text = str(result)

Also, the following will not work:

txt_field1.text = button_tapped()

If i understand correclty, you want to change the text when a button was pressed. However, button_tapped() will be evaluated right in this line, before the UI is presented. Instead, modify the text in the callback as shown above.

You might be able to streamline your code with something like:

def make_button(title, frame, background_color):
    return ui.Button(title=title,
                     frame=frame,
                     background_color=background_color,
                     font=('<System-Bold>', 20),
                     border_width=2,
                     corner_radius=5,
                     action=button_tapped)

Thank both. Ben to help understand better the logic and ccc to become pro my code.

What I want to know what button was tapped in order to use the correct Math operation (+ - * /) function o whatever that I coding

You only set the action function of your first button (4 times).

b_top1.action = button_tapped

In this function you need to test the self.title (SUM, DIV, ...) if you want to use it for all four operations.

Not the self.title but the sender.title, exactly like in the @bennr01 example at the bottom of his post

I suspect you also need to keep a list of pending operations, and then only execute when certain operations happen.

For instance, if you press 1, then 2, then plus, then 3, then *, then 4 then +....

Digits would be appended to the current value. When you detect an operand, you just check order of operations, before deciding whether to operate on the output value-- for instance when you encounter a plus, you would execute everything before the plus. But times, you would be operating on the input number, if that makes sense...