conway's game of life / Single Responsibility Principle

[hanscvanleeuwen]

Hi, I'm struggling with something basic
In the part where I use the movement keys to "draw" squares"

from tkinter import *
window = Tk()
canvas = Canvas(window, width=1200, height=900,bd=0, highlightthickness=0)
canvas.pack() 
text_ = Text(window, height=3, width=30)
text_.pack() 
text_.insert(END, "To MOVE use arrow keys. Press x to seed. ")

moves={"Up":(0, -50),"Down":(0,50), "Left":(-50,0), "Right":(50,0)} 
sq = canvas.create_rectangle(50, 50, 100, 100, fill="grey")

def movesquare(event):
    x,y=moves[event.keysym]
    canvas.move(1,x,y)         
def otherkey(event):
    keypressed = event.keysym
    if keypressed == "x":
        Square(canvas.coords(1))
class Square:
    def __init__(self,x1y1x2y2):
        self.x1y1x2y2=x1y1x2y2
        canvas.create_rectangle(self.x1y1x2y2)

bindings = {"<KeyPress-Up>" : movesquare, "<KeyPress-Down>": movesquare,
            "<KeyPress-Left>": movesquare, "<KeyPress-Right>": movesquare,
            "x": otherkey}
for binding in bindings:
    canvas.bind_all(binding, bindings[binding])   

mainloop()

The suggestion was to replace lines 24-28 with:

def bind_keys(canvas):
    """Bind all appropriate keys to the correct function."""
    bindings = {"<keypress-up>" : movesquare, "<keypress-down>": movesquare,
                "<keypress-left>": movesquare, "<keypress-right>": movesquare,
                "x": otherkey, "f": otherkey, "r": otherkey}
    for binding in bindings:
        canvas.bind_all(binding, bindings[binding])

How do you actually invoke the bind_key in the main?
If I use bind_keys() , I get Type error: missing 1 required positional argument: 'canvas'