resize

#!/usr/bin/env python3
import sys
import PIL
from PIL import Image


def help_message():
    print('Usage: python resizer.py <image> <new-height>')

def main():

    if len(sys.argv) == 1 and sys.argv[1] == '-h' or len(sys.argv) < 3:
        help_message()
        exit(0)
   
    img = sys.argv[1].split('.')
    file_name = img[0]
    extension = img[1]

    image = PIL.Image.open('{}.{}'.format(file_name, extension))
    height = int(sys.argv[2])
    
    height_percent = height / image.size[1]

    print('Old Dimension: {}'.format(image.size))
    print('Image ratio: {}'.format(height_percent))

    new_width = int(image.size[0] * height_percent)

    print('New dimension: {}, {}'.format(new_width, height))

    image = image.resize((new_width, height), PIL.Image.ANTIALIAS)
    image.save('{}{}.{}'.format(file_name, str(height), extension))

if __name__ == '__main__':
    main()