getting Error while constructing parser using argparse.ArgumentParser()

Question

I am doing data extraction from scanned document.I am using the below code for constructing and parsing the arguments:

from PIL import Image
import pytesseract
import argparse
import cv2
import os
import re
import io
import json
import ftfy

ap = argparse.ArgumentParser()
ap.add_argument("-i", "--image", required=True,
                help="path to input image to be OCR'd")
ap.add_argument("-p", "--preprocess", type=str, default="thresh",
                help="type of preprocessing to be done, choose from blur, linear, cubic or bilateral")
args = vars(ap.parse_args())

The line args = vars(ap.parse_args()) is throwing an error as below:

usage: [-h] -i IMAGE [-p PREPROCESS]
: error: the following arguments are required: -i/--image
An exception has occurred, use %tb to see the full traceback.

SystemExit: 2

C:\Users\Aditya\anaconda\lib\site-packages\IPython\core\interactiveshell.py:3339: UserWarning: To exit: use 'exit', 'quit', or Ctrl-D.
  warn("To exit: use 'exit', 'quit', or Ctrl-D.", stacklevel=1)

As I am new on working with images, so need help to solve this error.

how are yoy calling this script? You need to provide command line arguments. Is this a ipython console? — hpaulj
– hpaulj, Commented Dec 11, 2020 at 11:28
The ipyhon help shows: ipython [subcommand] [options] [-c cmd | -m mod | file] [--] [arg] ... The arguments for your argparse are those [arg] after the --. If instead you are running this in a jupyter notebook, you can't use argparse. — hpaulj
– hpaulj, Commented Dec 11, 2020 at 17:47

cristelaru vitian · Accepted Answer · 2020-12-11 10:18:29Z

1

Parse the args like this: args = ap.parse_args(), and you must give --image or -i parameter when launching the script (because you have required=True)

answered Dec 11, 2020 at 10:18

cristelaru vitian

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