"""
Example to load an image using argparse
"""
# Import the required packages
import argparse
import cv2
# We first create the ArgumentParser object# The created object 'parser' will have the necessary information
# to parse the command-line arguments into data types.
parser = argparse.ArgumentParser()
# We add 'path_image' argument using add_argument() including a help. The type of this argument is string (by default)
parser.add_argument("path_image", help="path to input image to be displayed")
# The information about program arguments is stored in 'parser'
# Then, it is used when the parser calls parse_args().
# ArgumentParser parses arguments through the parse_args() method:
args = parser.parse_args()
print(args.path_image)
# We can now load the input image from disk:
image = cv2.imread(args.path_image)
# Parse the argument and store it in a dictionary:
args = vars(parser.parse_args())
# Now, we can also load the input image from disk using args:
image2 = cv2.imread(args["path_image"])
# Show the loaded image:
cv2.imshow("loaded image", image)
cv2.imshow("loaded image2", image2)
# Wait until a key is pressed:
cv2.waitKey(0)
# Destroy all windows:
cv2.destroyAllWindows()
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