Python | Using PIL ImageGrab and PyTesseract

# cv2.cvtColor takes a numpy ndarray as an argument
import numpy as nm

import pytesseract

# importing OpenCV
import cv2

from PIL import ImageGrab


def imToString():

    # Path of tesseract executable
    pytesseract.pytesseract.tesseract_cmd ='**Path to tesseract executable**'
    while(True):

        # ImageGrab-To capture the screen image in a loop. 
        # Bbox used to capture a specific area.
        cap = ImageGrab.grab(bbox =(700, 300, 1400, 900))

        # Converted the image to monochrome for it to be easily 
        # read by the OCR and obtained the output String.
        tesstr = pytesseract.image_to_string(
                cv2.cvtColor(nm.array(cap), cv2.COLOR_BGR2GRAY), 
                lang ='eng')
        print(tesstr)

# Calling the function
imToString()