TclError: image doesn't exist - Tkinter multi-windows python

Question

Before I am asked to look over other topics, I just want to say that I have and all of the solutions either involve calling a tk.Toplevel() instead of tk.TK()

Answer 1

I actually can't reproduce the error, your code just doesn't show any image for me, but I do see two problems with the code you have.

The PhotoImage class __init__ method is defined as

class PhotoImage(Image):
    """Widget which can display colored images in GIF, PPM/PGM format."""
    def __init__(self, name=None, cnf={}, master=None, **kw):
        """Create an image with NAME.

        Valid resource names: data, format, file, gamma, height, palette,
        width."""
        Image.__init__(self, 'photo', name, cnf, master, **kw)

This means that the first argument is name. So when you call Logo = tk.PhotoImage("brand_logo.png"), you create an image with the name brand_logo.png, but without actually specifying which image file should be used. To specify the image file use the file keyword argument:

Logo = tk.PhotoImage(file="brand_logo.png")

With that out of the way, Logo is still a local variable to the __init__ function, so after that returns, Logo will be garbage collected. To prevent this, make it an instance variable by renaming it to self.Logo everywhere.