Pillow Error (Python) Cannot open shared object file

Question

When running code, pillow causes an error when imported Code was taken from the examples section of the GFX-Hat for the Raspberry Pi It seems to have problems when using a certain part of pillow. However I don't know how/if its possible to fix

def set_backlight(r, g, b):
    backlight.set_all(r, g, b)
    backlight.show()

menu_options = [
            MenuOption('Set BL Red', set_backlight, (255, 0, 0)),
            MenuOption('Set BL Green', set_backlight, (0, 255, 0)),
            MenuOption('Set BL Blue', set_backlight, (0, 0, 255)),
            MenuOption('Set BL Purple', set_backlight, (255, 0, 255)),
            MenuOption('Set BL White', set_backlight, (255, 255, 255)),
            MenuOption('Exit', sys.exit, (0,))
        ]

current_menu_option = 1

trigger_action = False

def handler(ch, event):
    global current_menu_option, trigger_action
    if event != 'press':
        return
    if ch == 1:
        current_menu_option += 1
    if ch == 0:
        current_menu_option -= 1
    if ch == 4:
        trigger_action = True
    current_menu_option %= len(menu_options)

for x in range(6):
    touch.set_led(x, 0)
    backlight.set_pixel(x, 255, 255, 255)
    touch.on(x, handler)

backlight.show()

def cleanup():
    backlight.set_all(0, 0, 0)
    backlight.show()
    lcd.clear()
    lcd.show()

atexit.register(cleanup)

try:
    while True:
        image.paste(0, (0, 0, width, height))
        offset_top = 0

        if trigger_action:
            menu_options[current_menu_option].trigger()
            trigger_action = False

        for index in range(len(menu_options)):
            if index == current_menu_option:
                break
            offset_top += 12

        for index in range(len(menu_options)):
            x = 10
            y = (index * 12) + (height / 2) - 4 - offset_top
            option = menu_options[index]
            if index == current_menu_option:
                draw.rectangle(((x-2, y-1), (width, y+10)), 1)
            draw.text((x, y), option.name, 0 if index == current_menu_option else 1, font)

        w, h = font.getsize('>')
        draw.text((0, (height - h) / 2), '>', 1, font)

        for x in range(width):
            for y in range(height):
                pixel = image.getpixel((x, y))
                lcd.set_pixel(x, y, pixel)

        lcd.show()
        time.sleep(1.0 / 30)

except KeyboardInterrupt:
    cleanup()

root@DietPiT:/home/os/programs# python3 menu-options.py Traceback (most recent call last): File "menu-options.py", line 6, in from PIL import Image, ImageFont, ImageDraw File "/usr/local/lib/python3.5/dist-packages/PIL/Image.py", line 94, in from . import _imaging as core ImportError: libopenjp2.so.7: cannot open shared object file: No such file or directory

The Code should display a menu on the GFX Hat

Mihai Andrei Mihai Andrei · Accepted Answer · 2019-02-02T22:48:17

Append the dir where that .so is located to the LD_LIBRARY_PATH environment variable.

Usually such errors are because the library has been packaged badly.

Do you have that .so? Can you install pillow with pip on that platform?

Pillow Error (Python) Cannot open shared object file

2 Answers