How can I connect ***kwargs and Canvas?

How can I connect ***kwargs and Canvas? I studied Digitalocean *args and **kwargs, but this is where I got stuck. What dictionary argument does **kwargs expect? Please help! Thanks!

Windows, Python, tkinter, Canvas.

import tkinter as tk

class Sketchpad(tk.Canvas):
    def __init__(self**,** parent**,** **kwargs):
        super().__init__(parent**,** **kwargs)

        self.bind("<Button-1>"**,** self.save_posn)
        self.bind("<B1-Motion>"**,** self.add_line)
        self.lastx**,** self.lasty = **0****,** **0
**        self.color = "black"

        szin_tegla = self.canvas.create_rectangle((**10****,** **10****,** **30****,** **30**)**,** fill="red")
        self.canvas.tag_bind(szin_tegla**,** "<Button-1>"**,** lambda x: self.set_color("red"))

        szin_tegla = self.canvas.create_rectangle((**10****,** **35****,** **30****,** **55**)**,** fill="blue")
        self.canvas.tag_bind(szin_tegla**,** "<Button-1>"**,** lambda x: self.set_color("blue"))

        szin_tegla = self.canvas.create_rectangle((**10****,** **60****,** **30****,** **80**)**,** fill="black")
        self.canvas.tag_bind(szin_tegla**,** "<Button-1>"**,** lambda x: self.set_color("black"))

    def save_posn(self**,** event):
        self.lastx**,** self.lasty = event.x**,** event.y

    def set_color(self**,** newcolor):
        self.color = newcolor

    def add_line(self**,** event):
        self.create_line((self.lastx**,** self.lasty**,** event.x**,** event.y))
        self.save_posn(event)


root = tk.Tk()
root.columnconfigure(**0****,** weight=**1**)
root.rowconfigure(**0****,** weight=**1**)

sketch = Sketchpad(root)
sketch.grid(column=**0****,** row=**0****,** sticky='nwes')

root.mainloop()