how can I make my pygame konami code simpler?

I am currently working on a pygame game and my friends asked if i could implement a konami code. I thought it was a great idea so i implemented it.

I made it in a way it would certainly work because I wouldnt have to deal with any errors. However.. the code got a bit larger then expected so i was wondering how i could make it smaller and still working because i dont know any good way to make it smaller.

the code:

konami_code = ['', '', '', '', '', '', '', '', '', '']

key = pygame.key.get_pressed()
for event in pygame.event.get():
    if event.type == pygame.KEYUP:
        if key[pygame.K_UP]:
            if konami_code[0] == '':
                konami_code[0] = 'UP'

            elif konami_code[0] == 'UP' 
                    and konami_code[1] == '':
                konami_code[1] = 'UP'

            else:
                konami_code = ['', '', '', '', '', '', '', '', '', '']

        if key[pygame.K_DOWN]:
            if konami_code[0] == 'UP' 
                    and konami_code[1] == 'UP' 
                    and konami_code[2] == '':
                konami_code[2] = 'DOWN'

            elif konami_code[0] == 'UP' 
                    and konami_code[1] == 'UP' 
                    and konami_code[2] == 'DOWN' 
                    and konami_code[3] == '':
                konami_code[3] = 'DOWN'

            else:
                konami_code = ['', '', '', '', '', '', '', '', '', '']

        if key[pygame.K_LEFT]:
            if konami_code[0] == 'UP' 
                    and konami_code[1] == 'UP' 
                    and konami_code[2] == 'DOWN' 
                    and konami_code[3] == 'DOWN' 
                    and konami_code[4] == '':
                konami_code[4] = 'LEFT'

            elif konami_code[0] == 'UP' 
                    and konami_code[1] == 'UP' 
                    and konami_code[2] == 'DOWN' 
                    and konami_code[3] == 'DOWN' 
                    and konami_code[4] == 'LEFT' 
                    and konami_code[5] == 'RIGHT' 
                    and konami_code[6] == '':
                konami_code[6] = 'LEFT'

            else:
                konami_code = ['', '', '', '', '', '', '', '', '', '']

        if key[pygame.K_RIGHT]:
           if konami_code[0] == 'UP' 
                    and konami_code[1] == 'UP' 
                    and konami_code[2] == 'DOWN' 
                    and konami_code[3] == 'DOWN' 
                    and konami_code[4] == 'LEFT' 
                    and konami_code[5] == '':
                konami_code[5] = 'RIGHT'

            elif konami_code[0] == 'UP' 
                    and konami_code[1] == 'UP' 
                    and konami_code[2] == 'DOWN' 
                    and konami_code[3] == 'DOWN' 
                    and konami_code[4] == 'LEFT' 
                    and konami_code[5] == 'RIGHT' 
                    and konami_code[6] == 'LEFT' 
                    and konami_code[7] == '':
                konami_code[7] = 'RIGHT'

            else:
                konami_code = ['', '', '', '', '', '', '', '', '', '']

        if key[pygame.K_b]:
            if konami_code[0] == 'UP' 
                    and konami_code[1] == 'UP' 
                    and konami_code[2] == 'DOWN' 
                    and konami_code[3] == 'DOWN' 
                    and konami_code[4] == 'LEFT' 
                    and konami_code[5] == 'RIGHT' 
                    and konami_code[6] == 'LEFT' 
                    and konami_code[7] == 'RIGHT' 
                    and konami_code[8] == '':
                konami_code[8] = 'B'

            else:
                konami_code = ['', '', '', '', '', '', '', '', '', '']

        if key[pygame.K_a]:
            if konami_code[0] == 'UP' 
                    and konami_code[1] == 'UP' 
                    and konami_code[2] == 'DOWN' 
                    and konami_code[3] == 'DOWN' 
                    and konami_code[4] == 'LEFT' 
                    and konami_code[5] == 'RIGHT' 
                    and konami_code[6] == 'LEFT' 
                    and konami_code[7] == 'RIGHT' 
                    and konami_code[8] == 'B' 
                    and konami_code[9] == '':
                konami_code[9] = 'A'

            else:
                konami_code = ['', '', '', '', '', '', '', '', '', '']



    if konami_code[0] == 'UP' 
        and konami_code[1] == 'UP' 
        and konami_code[2] == 'DOWN' 
        and konami_code[3] == 'DOWN' 
        and konami_code[4] == 'LEFT' 
        and konami_code[5] == 'RIGHT' 
        and konami_code[6] == 'LEFT' 
        and konami_code[7] == 'RIGHT' 
        and konami_code[8] == 'B' 
        and konami_code[9] == 'A':
    print('code completed')

Answer

You can store your konami code as a list of values. And then compare user input with that list:

import pygame

CODE = [pygame.K_UP, pygame.K_UP, pygame.K_DOWN, pygame.K_DOWN, pygame.K_LEFT, pygame.K_RIGHT, pygame.K_LEFT, pygame.K_RIGHT, pygame.K_b, pygame.K_a]

pygame.init()
screen = pygame.display.set_mode([500, 500])
code = []
index = 0
running = True
while running:
    key = pygame.key.get_pressed()
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            running = False
        elif event.type == pygame.KEYDOWN:
            if event.key == CODE[index]:
                code.append(event.key)
                index += 1
                if code == CODE:
                    index = 0
                    print('Bingo!')
            else:
                code = []
                index = 0

pygame.display.quit()
pygame.quit()