Python - OCR text with tesseract

#!/usr/bin/env python3

#
# Linux (Debian/Ubuntu/Mint) install:
#
#   apt install tesseract-ocr
#
# Python install:
#
#   pip install pillow
#   pip install pytesseract
#
# Links:
#   tesseract-ocr: https://github.com/tesseract-ocr/tesseract/wiki
#   pytesseract: https://github.com/madmaze/pytesseract
#   pillow: http://pillow.readthedocs.io
#

from PIL import Image
import pytesseract
#import PIL.ImageOps

region_power = (880, 810, 880+170, 810+60)

# test on screenshots: 0.jpg ... 9.jpg
for x in range(10):
    # open image
    img = Image.open('{}.jpg'.format(x))

    # get region
    img = img.crop(region_power)

    # in one line
    #img = Image.open('{}.jpg'.format(x)).crop(region_power)

    # invert colors - to get dark text on light background
    #img = PIL.ImageOps.invert(img)

    # convert to grayscale
    #img = img.convert('L')

    # in one line
    #img = PIL.ImageOps.invert(img).convert('L')

    #img.save('region-{}.jpg''.format(x))

    result = pytesseract.image_to_string(img)

    print(result)