@yaley ok. How about using pygame module? It might work :

import pygame
screen = pygame.display.set_mode((0,0,320,320))
while True:
    for event in pygame.event.get():
        if event.type == pygame.KEYDOWN or event.type == pygame.KEYUP:
            if event.mod == pygame.KMOD_NONE:
                print('No modifier keys were in a pressed state when this '
                  'event occurred.')
            else:
                if event.mod & pygame.KMOD_LSHIFT:
                     print('Left shift was in a pressed state when this event '
                      'occurred.')
                if event.mod & pygame.KMOD_RSHIFT:
                     print('Right shift was in a pressed state when this event '
                      'occurred.')
                if event.mod & pygame.KMOD_SHIFT:
                    print('Left shift or right shift or both were in a '
                      'pressed state when this event occurred.') 

@YaleY that would be a hard one…..

@yaley Yes, sorry, as @cvp and my tries, using pygame module is not possible in Pythonista because Pythonista doesn’t have pygame Stash also cannot

@yaley ok. How about using pygame module? It might work :

import pygame
screen = pygame.display.set_mode((0,0,320,320))
while True:
    for event in pygame.event.get():
        if event.type == pygame.KEYDOWN or event.type == pygame.KEYUP:
            if event.mod == pygame.KMOD_NONE:
                print('No modifier keys were in a pressed state when this '
                  'event occurred.')
            else:
                if event.mod & pygame.KMOD_LSHIFT:
                     print('Left shift was in a pressed state when this event '
                      'occurred.')
                if event.mod & pygame.KMOD_RSHIFT:
                     print('Right shift was in a pressed state when this event '
                      'occurred.')
                if event.mod & pygame.KMOD_SHIFT:
                    print('Left shift or right shift or both were in a '
                      'pressed state when this event occurred.') 

You can try to use

key_command(sender)

and

get_key_commands()

For documentation : visit here