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)
importtkinterastkcoords= [[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 errorroot.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