pygame and shift branching?

[metulburr]

import pygame as pg

pg.init()

screen = pg.display.set_mode((800,600))
done = False

while not done:
    keys = pg.key.get_pressed()
    for event in pg.event.get():
        if event.type == pg.QUIT:
            done = True
    if keys[pg.K_LSHIFT] and keys[pg.K_a]:
        print('left shift and a key pressed')
    elif keys[pg.K_LSHIFT] and keys[pg.K_b]:
        print('left shift and b key pressed')
    elif keys[pg.K_a]:
        print('only a key pressed')
    elif keys[pg.K_b]:
        print('only b key pressed')
    pg.display.update()

or

import pygame as pg

pg.init()

screen = pg.display.set_mode((800,600))
done = False

while not done:
    for event in pg.event.get():
        if event.type == pg.QUIT:
            done = True
        elif event.type == pg.KEYDOWN:
            if event.key == pg.K_a and pg.key.get_mods() & pg.KMOD_SHIFT:
                print('shift and a keys pressed')
            elif event.key == pg.K_b and pg.key.get_mods() & pg.KMOD_SHIFT:
                print('shift and b keys pressed')
            elif event.key == pg.K_a:
                print('only a key pressed')
            elif event.key == pg.K_b:
                print('only b key pressed')
    pg.display.update()