Tkinter - How to change text into an image?

You can use ImageDraw to create the image you want:

from tkinter import *
import random
from PIL import Image, ImageTk, ImageDraw, ImageFont

win = Tk()
win.geometry('200x200')

alphabets = ["A", "B", "C"]
rand_alpha = random.choice(alphabets)

image = Image.new('RGB', (200, 200), (255, 255, 255))  # adjust the size to what you want
draw = ImageDraw.Draw(image)
font = ImageFont.truetype('arial.ttf', size=128) # adjust the font and size to what you want
w, h = draw.textsize(rand_alpha, font=font)
draw.text(((200-w)//2, (200-h)//2), font=font, text=rand_alpha, fill='black')
tkimage = ImageTk.PhotoImage(image)

lbl = Label(win, image=tkimage)
lbl.pack()

win.mainloop()

Refer to ImageDraw document for how to use it.

I have written an example with tkinter and PIL modules. I have added several comment to my code for the better understanding.

Code:

from tkinter import *
from PIL import Image, ImageDraw, ImageTk
import random

win = Tk()
win.geometry("200x200")

alphabets = ["A", "B", "C"]
rand_alpha = random.choice(alphabets)

img = Image.new("RGB", (100, 100), color="white")  # Create a new 100x100 white image
d = ImageDraw.Draw(img)  # Create Draw instance
d.text((50, 50), rand_alpha, fill=(255, 0, 0))  # Render the text to the image at 50x50 position with red color.

render = ImageTk.PhotoImage(img)  # Rendering picture to TK
img = Label(win, image=render)  # Insert picture to Label widget.
img.image = render
img.place(x=0, y=0)  # Place the picture to the left-top corner


win.mainloop()

GUI:

Sure you could:

from tkinter import *
import random
from PIL import Image, ImageTk

img = ImageTk.PhotoImage(Image.open("Yourimage"))
win = Tk()
win.geometry('200x200')

alphabets = ["A", "B", "C"]
rand_alpha = random.choice(alphabets)

lbl = Label(win, font='Ariel 30', text=rand_alpha, image=img)
lbl.pack()

win.mainloop()

If you don't want to your image cover your text, you need to use compound=[CENTER,BOTTOM,TOP,LEFT,RIGHT].