locate number with pyautogui

#! python3
import sys
import pyautogui

# locate Power
found = dict()
for digit in range(10):
    positions = pyautogui.locateOnScreen('digits/{}.png'.format(digit), region=(888, 920, 150, 40), grayscale=True)

    for x, _, _, _ in positions:
        found[x] = str(digit)

# without indentions
cols = sorted(found)
value = ''.join(found[col] for col in cols)
print(value)