import time

from tkinter import $*$

from random import randint

class ButtonWrapper:

def $($self$,$ id$=""\text{'},$ row$=-1,$ col$=-1,c=")$:

self.ID $=$ id

self. ROW $=$ row

self. COL $=$ COL

self. COLOR $=C$

self.BUTTON$\_$OBJ $=$ None

Check if two buttons have been clicked and if they are a match""."

def check$\_$match$()$:

global buttons

clicked $=[]$

for $b$ in buttons. values$()$:

if b$.$BUTTON$\_$OB$][\text{'}$relief$\text{'}]==$ "sunken":

clicked.append $($b$)$

if len$($clicked$)2$ :

if clicked $[0].$BUTTON$\_$OBJ $[\text{'}$bg$\text{'}]==$ clicked$[1].$BUTTON$\_$OBJ $[\text{'}$bg $\text{'}]$ :

# It's a match

clicked $[0].$ BUTTON$\_$OBJ. configure$($fg$=$'black', bg$=$'black', relief$=$'raised'$)$

clicked $[1].$BUTTON$\_$OBJ. configure$($fg$=$'black', bg$=$'black', relief$=$'raised $\text{'})$

# black

else:

clicked $[0].$ BUTTON$\_$OBJ. configure $($fg$=$'SystemButtonFace', bg$=$'SystemButtonFace', relief$=$'raised $\text{'})$

clicked $[1].$BUTTON$\_$OB$].$ configure $($fg$=$'SystemButtonFace', bg$=$'SystemButtonFace', relief$=\text{'}$ raised'$)$

If a button is pushed, draw the correct colors"$\text{'}."$

def button$\_$pushed$($pushed$\_$id$)$:

global buttons

buttons $[$pushed$\_$id$].$BUTTON$\_$OBJ.configure$($bg$=$buttons$[$pushed$\_$id$].$COLOR, relief$=$"sunken"$)$

# Because time.sleep blocks execution, the color change for the second button clicked does not take effect until

# the function returns. So we need to use the 'after$()\text{'}$ method

# Parameters:

# parent: is the object of the widget or main window whichever is using this function.

# ms: is the time in milliseconds.

# function: which shall be called.

# $*$args: other options.

buttons $[$pushed$\_$id$].$BUTTON$\_$OBJ.after$(1500,$ check$\_$match$)$

def close$\_$options$($top$)$:

top.destroy$()$H