tkinter code

from pprint import pprint
from tkinter import *

root = Tk()
root.geometry("600x400")
root.title("Рисовалка")
root['bg'] = "gray75"
root.resizable(False, False)

cv = Canvas(root, width=540, height=400, bg="white")
cv.grid(row=0, column=0, rowspan=7)

state = "circle"
brush = 10
color = "red"


def choose(button_name):
    global state
    state = button_name


def paint(event):
    if event.widget.__class__ is not Canvas:
        print("Ты нажал не на Холст!")
        return
    if state == "circle":
        cv.create_oval(event.x - brush,  # Координата x1
                       event.y - brush,  # Координата y1
                       event.x + brush,  # Координата x2
                       event.y + brush,  # Координата y2
                       fill=color,  # Цвет заливки
                       outline=color)  # Цвет обводки
    elif state == "square":
        cv.create_rectangle(event.x - brush, event.y - brush,
                            event.x + brush, event.y + brush,
                            fill=color, outline=color)
    elif state == "line1":
        cv.create_line(event.x - brush, event.y - brush,
                       event.x + brush, event.y + brush, fill=color)
    elif state == "line2":
        cv.create_line(event.x + brush, event.y - brush,
                       event.x - brush, event.y + brush, fill=color)

    pprint(event.__dict__)


root.bind_all("<1>", paint)
root.bind_all("<B1-Motion>", paint)

square_btn = Button(root, text="🟥", font=(None, 20), command=lambda: choose("square"))
square_btn.grid(row=0, column=1)
circle_btn = Button(root, text="🔴", font=(None, 20), command=lambda: choose("circle"))
circle_btn.grid(row=1, column=1)
line1_btn = Button(root, text=" ↘ ", font=(None, 20), command=lambda: choose("line1"))
line1_btn.grid(row=2, column=1)
line2_btn = Button(root, text=" ↙ ", font=(None, 20), command=lambda: choose("line2"))
line2_btn.grid(row=3, column=1)

plus_btn = Button(root, text="➕", font=(None, 20), command=lambda: choose("plus"))
plus_btn.grid(row=4, column=1)
minus_btn = Button(root, text="➖", font=(None, 20), command=lambda: choose("minus"))
minus_btn.grid(row=5, column=1)
size = Label(root, text=brush, fg=color, font=(None, 32))
size.grid(row=6, column=1)

root.mainloop()