How to draw lines on canvas?

Not entirely sure what you're asking, since you neither showed us your full code, nor did you say anything "completely useless". It looks like you've figured out how to draw rectangles, and the same tutorial should have some knowledge about drawing lines, like the ones linked in the comments .

Since this doesn't seem to help you, the likely problem is that you are using Python 3, the Tkinterpackage has been renamed to tkinter. This example should work for you:

import tkinter

root = tkinter.Tk()
canvas = tkinter.Canvas(root)
canvas.pack()

for i in range(10):
    canvas.create_line(50 * i, 0, 50 * i, 400)
    canvas.create_line(0, 50 * i, 400, 50 * i)
canvas.create_rectangle(100, 100, 200, 200, fill="blue")
canvas.create_line(50, 100, 250, 200, fill="red", width=10)

root.mainloop()

Addendum: I just noticed two real problems with your code:

• This way p = Canvas(height = 600, width = 800).place(x=0,y=0), the variable pwill not be assigned Canvas, but the return value placeof the , ie None.
• Also, the constructor should include the parent element to add Canvasto ( rootin my example).

Here is a very thorough introduction to all of Tkinter , especially the Canvas element.