A simple paint application using tkinter in Python 3

paint.py

from tkinter import *
from tkinter.colorchooser import askcolor


class Paint(object):

    DEFAULT_PEN_SIZE = 5.0
    DEFAULT_COLOR = 'black'

    def __init__(self):
        self.root = Tk()

        self.pen_button = Button(self.root, text='pen', command=self.use_pen)
        self.pen_button.grid(row=0, column=0)

        self.brush_button = Button(self.root, text='brush', command=self.use_brush)
        self.brush_button.grid(row=0, column=1)

        self.color_button = Button(self.root, text='color', command=self.choose_color)
        self.color_button.grid(row=0, column=2)

        self.eraser_button = Button(self.root, text='eraser', command=self.use_eraser)
        self.eraser_button.grid(row=0, column=3)

        self.choose_size_button = Scale(self.root, from_=1, to=10, orient=HORIZONTAL)
        self.choose_size_button.grid(row=0, column=4)

        self.c = Canvas(self.root, bg='white', width=600, height=600)
        self.c.grid(row=1, columnspan=5)

        self.setup()
        self.root.mainloop()

    def setup(self):
        self.old_x = None
        self.old_y = None
        self.line_width = self.choose_size_button.get()
        self.color = self.DEFAULT_COLOR
        self.eraser_on = False
        self.active_button = self.pen_button
        self.c.bind('<B1-Motion>', self.paint)
        self.c.bind('<ButtonRelease-1>', self.reset)

    def use_pen(self):
        self.activate_button(self.pen_button)

    def use_brush(self):
        self.activate_button(self.brush_button)

    def choose_color(self):
        self.eraser_on = False
        self.color = askcolor(color=self.color)[1]

    def use_eraser(self):
        self.activate_button(self.eraser_button, eraser_mode=True)

    def activate_button(self, some_button, eraser_mode=False):
        self.active_button.config(relief=RAISED)
        some_button.config(relief=SUNKEN)
        self.active_button = some_button
        self.eraser_on = eraser_mode

    def paint(self, event):
        self.line_width = self.choose_size_button.get()
        paint_color = 'white' if self.eraser_on else self.color
        if self.old_x and self.old_y:
            self.c.create_line(self.old_x, self.old_y, event.x, event.y,
                               width=self.line_width, fill=paint_color,
                               capstyle=ROUND, smooth=TRUE, splinesteps=36)
        self.old_x = event.x
        self.old_y = event.y

    def reset(self, event):
        self.old_x, self.old_y = None, None


if __name__ == '__main__':
    Paint()

Can someone review my code . I am not getting final expected output - import tkinter as tk
import zipfile
import os

create a directory to store the extracted images

if not os.path.exists('images'):
os.mkdir('images')

extract the contents of the images.zip file to the images directory

with zipfile.ZipFile('images.zip', 'r') as zip_ref:
zip_ref.extractall('images')

#Step 1: Import necessary libraries
from tkinter import *
from tkinter import ttk
from PIL import Image, ImageTk

#Step 2: Create a class for the Pizza Builder app and extend it from the tk.Frame class
class PizzaBuilderApp(Frame):
    def __init__(self, parent):
        super().__init__(parent)

#Step 3: Create the overall layout of the app using grid geometry manager
        self.grid(column=0, row=0, sticky=(N, W, E, S))
        self.columnconfigure(0, weight=1)
        self.rowconfigure(0, weight=1)

#Step 4: Create a separator widget to separate each section of the app
        ttk.Separator(self, orient="horizontal").grid(row=0, column=0, sticky="ew")


#Step 5: Create radio buttons for pizza size options
        size_label = Label(self, text="Pizza Size")
        size_label.grid(row=1, column=0, sticky=W, padx=5)
        self.size_var = StringVar(value="Small")
        size_options = ["Small", "Medium", "Large"]
        for i, size in enumerate(size_options):
            Radiobutton(self, text=size, variable=self.size_var, value=size, command=self.update_pizza_image).grid(row=2, column=i, padx=5)

#Step 6: Create radio buttons for crust options
        crust_label = Label(self, text="Crust")
        crust_label.grid(row=3, column=0, sticky=W, padx=5)
        self.crust_var = StringVar(value="New York Thin Crust")
        crust_options = ["New York Thin Crust", "Chicago Deep Dish"]
        for i, crust in enumerate(crust_options):
            Radiobutton(self, text=crust, variable=self.crust_var, value=crust, command=self.update_pizza_image).grid(row=4, column=i, padx=5)


#Step 7: Create an OptionMenu for sauce options
        sauce_label = Label(self, text="Sauce")
        sauce_label.grid(row=5, column=0, sticky=W, padx=5)
        self.sauce_var = StringVar(value="Tomato")
        sauce_options = ["Tomato", "Pesto", "Barbecue", "Alfredo"]
        sauce_menu = OptionMenu(self, self.sauce_var, *sauce_options, command=self.update_pizza_image)
        sauce_menu.grid(row=6, column=0, padx=5, pady=5)

#Step 8: Create a ListBox for cheese options
        cheese_label = Label(self, text="Cheese")
        cheese_label.grid(row=7, column=0, sticky=W, padx=5)
        self.cheese_var = StringVar(value="Normal")
        cheese_options = ["None", "Normal", "Extra"]
        cheese_listbox = Listbox(self, listvariable=self.cheese_var, selectmode=SINGLE, height=len(cheese_options))
        for i, cheese in enumerate(cheese_options):
            cheese_listbox.insert(i, cheese)
        cheese_listbox.grid(row=8, column=0, padx=5, pady=5)
        cheese_scrollbar = Scrollbar(self, orient="vertical", command=cheese_listbox.yview)
        cheese_scrollbar.grid(row=8, column=1, sticky=N+S)
        cheese_listbox.configure(yscrollcommand=cheese_scrollbar.set)

#Step 9: Implement the "Build Pizza" Button

class PizzaBuilder(Frame):
def init(self, parent):
super().init(parent)

    # create "Build Pizza" button
    self.build_button = Button(self, text="Build Pizza", command=self.build_pizza_handler)
    self.build_button.grid(row=9, column=0, padx=5, pady=5)

#build_button = Button(self, text="Build Pizza", command=self.build_pizza_handler)
#build_button.grid(row=9, column=0, padx=5, pady=5)
def build_pizza_handler(self):
# Collect user's selected options
pizza_size = self.pizza_size.get()
crust = self.crust.get()
sauce = self.sauce.get()
cheeses = self.cheeses.curselection()
toppings = [topping.get() for topping in self.toppings]
seasoning = self.seasoning_var.get()

# Create a list of images to stack on top of each other
images = []
images.append(Image.open(f'images/crust_{crust.lower().replace(" ", "_")}.png'))
images.append(Image.open(f'images/sauce_{sauce.lower().replace(" ", "_")}.png'))
if "0" not in cheeses:
    images.append(Image.open(f'images/cheese_normal.png'))
if "1" in cheeses:
    images.append(Image.open(f'images/cheese_extra.png'))
for i, topping_selected in enumerate(toppings):
    if topping_selected:
        images.append(Image.open(f'images/topping_{i+1}.png'))
if seasoning:
    images.append(Image.open('images/seasoning.png'))

# Resize images to 600x600
images_resized = []
for image in images:
    image_resized = image.resize((600, 600))
    images_resized.append(image_resized)

# Create a composite image
pizza_image = Image.new('RGBA', (600, 600), (255, 255, 255, 0))
for image in images_resized:
    pizza_image = Image.alpha_composite(pizza_image, image)

# Display the composite image on the GUI
pizza_image_tk = ImageTk.PhotoImage(pizza_image)
self.pizza_display_label.config(image=pizza_image_tk)
self.pizza_display_label.image = pizza_image_tk



    # Create a new blank image to paste the pizza layers onto
    pizza_image = Image.new('RGBA', (600, 600), (255, 255, 255, 255))

    # Paste each layer onto the pizza image
    for img in images:
        pizza_image.paste(img, (0, 0), img)

    # Display the final pizza image
    pizza_image.show()

############################################################################################
def update_pizza_image(self):
# Collect user's selected options
pizza_size = self.size_var.get()
crust = self.crust_var.get()
sauce = self.sauce_var.get()

# Load the crust and sauce images
crust_image = Image.open(f'images/crust_{crust.lower().replace(" ", "_")}.png')
sauce_image = Image.open(f'images/sauce_{sauce.lower().replace(" ", "_")}.png')

# Resize the crust and sauce images based on the pizza size
if pizza_size == 'Small':
    crust_image = crust_image.resize((200, 200))
    sauce_image = sauce_image.resize((200, 200))
elif pizza_size == 'Medium':
    crust_image = crust_image.resize((300, 300))
    sauce_image = sauce_image.resize((300, 300))
else:
    crust_image = crust_image.resize((400, 400))
    sauce_image = sauce_image.resize((400, 400))

# Combine the crust and sauce images into one
pizza_image = Image.alpha_composite(crust_image, sauce_image)

# Display the pizza image
self.pizza_image_tk = ImageTk.PhotoImage(pizza_image)
self.pizza_image_label.config(image=self.pizza_image_tk)


def build_pizza_handler(self):
    # Collect user's selected options
    pizza_size = self.size_var.get()
    crust = self.crust_var.get()
    sauce = self.sauce_var.get()
    cheeses = self.cheese_var.get()
    toppings = [topping_var.get() for topping_var in self.topping_vars]
    seasoning = self.seasoning_var.get()

    # Create a list of images to stack on top of each other
    images = []
    crust_image = Image.open(f'images/crust_{crust.lower().replace(" ", "_")}.png')
    images.append(crust_image)
    sauce_image = Image.open(f'images/sauce_{sauce.lower().replace(" ", "_")}.png')
    images.append(sauce_image)
    if cheeses == "Normal":
        cheese_image = Image.open(f'images/cheese_normal.png')
        images.append(cheese_image)
    elif cheeses == "Extra":
        cheese_image = Image.open(f'images/cheese_extra.png')
        images.append(cheese_image)
    for i, topping_selected in enumerate(toppings):
        if topping_selected:
            topping_image = Image.open(f'images/topping_{i+1}.png')
            images.append(topping_image)
    if seasoning:
        seasoning_image = Image.open('images/seasoning.png')
        images.append(seasoning_image)

############################################################################################

#Step 10: Initialize the GUI
class PizzaBuilder(tk.Frame):
def init(self, parent):
super().init(parent)
if name == 'main':
root = tk.Tk()
root.title("Procedural Object-Oriented Pizza Company")
root.geometry("800x600")

pizza_builder = PizzaBuilder(root)
pizza_builder.pack(expand=True, fill='both')

root.mainloop()

################################################################################################

import os
import uuid
import base64
from PIL import Image
from io import BytesIO
from typing import Dict, List
from fastapi import FastAPI, HTTPException, status
from fastapi.middleware.cors import CORSMiddleware
from pydantic import BaseModel

app = FastAPI()

Allow Cross-Origin Resource Sharing (CORS)

app.add_middleware(
CORSMiddleware,
allow_origins=[""],
allow_credentials=True,
allow_methods=[""],
allow_headers=["*"],
)

class Pizza(BaseModel):
crust: str
cheese: List[str]
sauce: str
toppings: List[str]

def generate_pizza_image(pizza: Pizza) -> str:
# Load the pizza image
pizza_image_path = os.path.join("images", "pizza.jpg")
pizza_image = Image.open(pizza_image_path)

# Resize the pizza image
pizza_image = pizza_image.resize((500, 500))

# Add the selected toppings to the pizza image
toppings_path = os.path.join("images", "toppings")
for topping in pizza.toppings:
    topping_path = os.path.join(toppings_path, f"{topping}.png")
    topping_image = Image.open(topping_path)
    pizza_image.paste(topping_image, (0, 0), topping_image)

# Convert the pizza image to base64 string
buffered = BytesIO()
pizza_image.save(buffered, format="PNG")
return base64.b64encode(buffered.getvalue()).decode()

@app.post("/build_pizza")
async def build_pizza_handler(pizza: Pizza):
try:
# Generate the pizza image
pizza_image = generate_pizza_image(pizza)

    # Return the pizza image as a base64 string
    return {"pizza_image": pizza_image}
except Exception as e:
    raise HTTPException(
        status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
        detail=str(e)
    )