Please help me fix my errors in Python. def read_data(filename):     try:         with open(filename, "r") as file:             return file.read()      except Exception as exception:         print(exception)         return None def extract_data(tags, strings):     data = []     start_tag = f"<{tags}>"     end_tag = f""     while start_tag in strings:         try:             start_index = strings.find(start_tag) + len(start_tag)             end_index = strings.find(end_tag)             value = strings[start_index:end_index]             if value:                 data.append(value)             strings = strings[end_index + len(end_tag):]         except Exception as exception:             print(exception)     return data def get_names(string):     names = extract_data("name", string)     return names def get_descriptions(string):     descriptions = extract_data("description", string)     return descriptions def get_calories(string):     calories = extract_data("calories", string)     return calories def get_prices(string):     prices = extract_data("price", string)     return prices def display_menu(names, descriptions, calories, prices):     for i in range(len(names)):         print(f"{names[i]} - {descriptions[i]} - {calories[i]} - {prices[i]}") def display_stats(names, calories, prices):     try:         total_items = len(names)         average_calories = (sum(map(int, calories)) / total_items if                              total_items > 0 else 0)         average_price = (sum([float(price[1:]) for price in prices]) /                          total_items if total_items > 0 else 0)         if names and calories and prices:             print(f"\n{total_items} items - {average_calories:.1f} average calories - ${average_price:.2f} average price")     except:         print("Please insert a valid number.") def main():     filename = "simple.xml"     string = read_data(filename)     if string:         names = get_names(string)         descriptions = get_descriptions(string)         calories = get_calories(string)         prices = get_prices(string)         if names and prices and descriptions and calories:             display_menu(names, descriptions, calories, prices)             display_stats(names, calories, prices) main()

Please help me fix my errors in Python.

def read_data(filename):
    try:
        with open(filename, "r") as file:
            return file.read() 
    except Exception as exception:
        print(exception)
        return None

def extract_data(tags, strings):
    data = []
    start_tag = f"<{tags}>"
    end_tag = f"</{tags}>"
    while start_tag in strings:
        try:
            start_index = strings.find(start_tag) + len(start_tag)
            end_index = strings.find(end_tag)
            value = strings[start_index:end_index]
            if value:
                data.append(value)
            strings = strings[end_index + len(end_tag):]
        except Exception as exception:
            print(exception)
    return data

def get_names(string):
    names = extract_data("name", string)
    return names

def get_descriptions(string):
    descriptions = extract_data("description", string)
    return descriptions

def get_calories(string):
    calories = extract_data("calories", string)
    return calories

def get_prices(string):
    prices = extract_data("price", string)
    return prices

def display_menu(names, descriptions, calories, prices):
    for i in range(len(names)):
        print(f"{names[i]} - {descriptions[i]} - {calories[i]} - {prices[i]}")

def display_stats(names, calories, prices):
    try:
        total_items = len(names)
        average_calories = (sum(map(int, calories)) / total_items if 
                            total_items > 0 else 0)
        average_price = (sum([float(price[1:]) for price in prices]) / 
                        total_items if total_items > 0 else 0)
        if names and calories and prices:
            print(f"\n{total_items} items - {average_calories:.1f} average calories - ${average_price:.2f} average price")
    except:
        print("Please insert a valid number.")

def main():
    filename = "simple.xml"
    string = read_data(filename)
    if string:
        names = get_names(string)
        descriptions = get_descriptions(string)
        calories = get_calories(string)
        prices = get_prices(string)
        if names and prices and descriptions and calories:
            display_menu(names, descriptions, calories, prices)
            display_stats(names, calories, prices)

main()