Tkinter Canvas.coords does not flatten arguments (original) (raw)

Bug report
Double nested arrays in tk.coords will produce errors in tkinter (_tkinter.TclError: wrong # coordinates: expected at least 4, got 2 in this case)

import tkinter as tk

coords = [[100, 100], [300, 300]]

root = tk.Tk() canvas = tk.Canvas(width=400, height=400, background="bisque") canvas.pack(fill="both", expand=True) line = canvas.create_line(coords) coords[1] = [200, 200] canvas.coords(line, coords) # line with error

root.mainloop()

Your environment

• CPython versions tested on: 3.10.4
• Operating system: Windows 10

Linked PRs

• gh-94473: Flatten arguments in tkinter.Canvas.coords() #98479