Tkinter Canvas postscript outputing black rectangles instead of child widget

Question

I am working on Tkinter (Python3.12) on Windows 10. My issue is that when using postscript on a Canvas on which a window was drawn, only black rectangles appear instead.

After some tests, the background of the frame given in the create_window method does appear, but there are black rectangles instead of the children widgets.

For a simple reproductible example, I ran the code from this question : Tkinter Canvas Postscript not capturing Window elements outside of screen frame both on Windows 10 and on Debian 12.

Here is a simplified code snippet which saves the canvas in outfile.ps :

from tkinter import Tk, Canvas, Frame, Text, Label
class Example(Tk):
 def __init__(self):
 """Example canvas with a circle and a frame and label"""
 super().__init__()
 cv = Canvas(self)
 cv.config(background="white", width=120, height=120)
 cv.pack()
 text = "Hello Word!"
 window = Frame(cv)
 Label(window, text=text).pack(padx=2, pady=2)
 pos = (60, 60)
 cv.create_window(pos, window=window)
 bbox = (pos[0]-40, pos[1]-40, pos[0]+50, pos[1]+50)
 cv.create_oval(bbox, width=3, outline="green")
 self.update()
 cv.update()
 self.update_idletasks()
 x1, y1, x2, y2 = cv.bbox("all")
 cv.postscript(file="outfile.ps", colormode="color", x=x1, y=y1, width=x2, height=y2)
 print("Wrote file outfile.ps...")
root = Example()
root.mainloop()

Running this on Windows gives the following image : link here, but it works on Debian 12.

Is this a Windows issue with no workaround ?

• user30412914: Try this Label(window, text=text, bg='black',fg='red').pack(padx=2, pady=2)
• ciaraGT: Still the same result : black rectangle and ne text in the output...
• acw1668: Use create_text() instead of create_window() if you just want to show text.
• acw1668: Try putting the label widget directly using create_window() instead (i.e. without the frame widget).
• ciaraGT: It does work when directly putting the Label in create_window(), however in my usecase I have a much more complicated Frame with different Widgets that I need to export to ps.

Answer 1

Upgrading to Python 3.13 solved the issue, so the explanation is probably a version incompatibility with Windows 10 and Python 3.12 for this particular case.