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1. import tkinter as tk

2.  

3. def change_color(event):

4.     event.widget.configure(bg="red")

5.  

6. root = tk.Tk()

7. label = tk.Label(root, text="Click me!")

8. label.bind("", change_color)

9. label.pack()

10.  

11. root.mainloop()

What will happen when you click on the label?

1. class BaseClass:

2.     pass

3.  

4. class DerivedClass(BaseClass):

5.     pass

6.  

7. print(DerivedClass.__bases__)

What is the __bases__ special attribute for?

def process_data(*args, **kwargs):

    if "mode" in kwargs:

        mode = kwargs['mode']

        if mode == 'sum':

            result = sum(args)

        elif mode == 'product':

            result = 1

            for arg in args:

                result *= arg

        else:

            result = None

    else:

        result = None

 return result

Which of the following function calls will correctly compute the product of the given numbers?