RGBA image not showing up with Pillow and tkinter - python-3.x

Question

I am trying to get a PNGA image to show up in my UI using Pillow and Tkinter. I'm on python 3.7.7 on macOS.
import sys
import tkinter as tk
from PIL import ImageTk, Image
path = "path_to_image.png"
im = Image.open(path)
print(im.mode) # prints RGBA
root = tk.Tk()
root.title("Karel")
frame = tk.Frame(root)
frame.pack()
canvas = tk.Canvas(frame, bg="white", width=500, height=500)
canvas.pack()
img = Image.open(path) # PIL solution
img = img.resize((250, 250), Image.ANTIALIAS) #The (250, 250) is (height, width)
img = ImageTk.PhotoImage(img) # convert to PhotoImage
image = canvas.create_image(150,150, image = img)
root.mainloop()
When I try this with images without an alpha channel, it works. Adding img = ImageTk.PhotoImage(img.convert("RGB")) to remove the alpha channel makes a black box appear.
Any help would be greatly appreciated.
The image:

Answer 1

I don't understand what you are trying to do, but the issue is that all the information in your image is in the alpha (i.e. transparency) channel. I can demonstrate that by splitting out the R, G, B and A channels using ImageMagick in the Terminal like this and laying them out beside each other:
magick image.png -channel RGBA -separate -background none +smush 10 result.png
So, the Red, Green and Blue channels are all zero (i.e. black), and the alpha channel has white where it is transparent and you can see through to the RGB black, and it has black where it is transparent.
So, as regards your question, since all the info is in the alpha channel, you could take just the alpha channel as your image:
#!/usr/bin/env python3
import tkinter as tk
from PIL import ImageTk, Image
root = tk.Tk()
root.title("Karel")
frame = tk.Frame(root)
frame.pack()
canvas = tk.Canvas(frame, bg="red", width=500, height=500)
canvas.pack()
path = "image.png"
img = Image.open(path).getchannel('A') # Take just alpha channel
img = img.point(lambda a: 255-a) # Invert black/white
img = img.resize((250, 250), Image.ANTIALIAS)
img = ImageTk.PhotoImage(img)
image = canvas.create_image(150,150, image = img)
root.mainloop()
Note that you can easily install ImageMagick on macOS with homebrew:
brew install imagemagick
If you work with images, while you are there, get these packages too:
brew install pngcheck exiftool jhead