python - Wow, changing indentation broke my program?

Question

My little Python and Kivy script was working. Then a little lightbulb popped up with an option to do something like adjust the style, which seemed like a good idea so I did. Then, it would not run unless I changed the indent spaces to multiples of 3 in the .kv file instead of 4. I did, and suddenly the window I'm creating with a box layout was far wider, and all of the button, image, and labels were in the bottom left corner whereas before they were stacked with the label, image, and button vertically filling the window. I'd try undoing the indenting spaces to 3s, but it throws an error on any line not spaced like that. Here is the kivy code. I did not change the python code, or spaces. I know how weird this sounds but...

<Pat_layout>:

   BoxLayout:
      orientation: "vertical"
      size: root.width, root.height

   Label:
      id: name_label
      text:  "Get ready for exercises"
      size_hint: (1, .5)
      font_size: 32
      multiline: True

   Image:
      id: image_window
      size_hint: (1, .5)
      source: 'images/dim_1-4.jpg'

   Button:
      size_hint: (1, .5)
      font_size: 32
      text: "Next Exercise"
      on_press: root.press()

question from:https://stackoverflow.com/questions/65856611/wow-changing-indentation-broke-my-program

Answer 1

Thank you everyone. It was indeed my indentation. When the 4-line Image section in the following was corrected to four space indents, it stopped putting things in the bottom left corner, and nicely put my label, image, and button stacked vertically and taking the full width.

Thanks to you guys.....

Jim

<Pat_layout>:??    
    BoxLayout:?        
        orientation: "vertical"?        
        size: root.width, root.height??        

    Label:?            
        id: name_label?            
        text:  "Exercises Appear Here"?            
        font_size: 32??    
    
    Image:?            
        id: image_window?            
        size_hint: (1, .5)?            
        source: 'images/dim_1-4.jpg'??        

    Button:?            
        size_hint: (1, .5)?            
        font_size: 32?           
        text: "Press For Next Exercise"?            
        on_press: root.press()