Pysimplegui: [Question] Remove "Ok" button from popup

Found the solution by taking a look at source code (psg).
Just provide the button_type argument like this:

sg.Popup("This is a simple popup", button_type=5)

In PySimpleGUI there are 5 types of button configurations:

Yes, No: 1
Cancel: 2
Error: 3
Ok, cancel: 4
No button: 5

I crack up when people ask for changes to popup.

Don't be afraid of making your own popup / window. You can create, display, read and close a window in a single line of code now by using the close parameter. Otherwise it's 3 lines of code. Create, read, close. When it's this simple to create your own windows you don't need modifications to popup... you can easily make your own, in-line.

I'm curious how you are going to close your window if it has no buttons an no titlebar.

You can also call popup_no_buttons. This is why the button parameter exists. It's not meant to be something user accessible according to the doc string:

    :param button_type: (enum) NOT USER SET!  Determines which pre-defined buttons will be shown (Default value = POPUP_BUTTONS_OK). There are many Popup functions and they call Popup, changing this parameter to get the desired effect.

If you do use it, I recommend not setting it to a hard coded value like 5. Since it's an 'enum' the recommended way to doing it is to use POPUP_BUTTONS_NO_BUTTONS. I would suggest using the call rather than the parameter.