Python3 script to resize photos

gistfile1.py

#!/usr/bin/env python3
#
# Usage:
#     resizer.py DIRECTORY_WITH_PHOTOS MAX_WIDTH_HEIGHT
#
# Example:
#     resizer.py ~/Dropbox/Camera\ Uploads 2048

import os
import sys
import subprocess
import fnmatch

BOLD = '\033[1m'
RED = '\033[91m'
ENDC = '\033[0m'
GREEN = '\033[92m'
SUPPORTED_EXTENSIONS = ('.jpg', '.jpeg', '.JPG', '.JPEG')

def sysrun(cmd):
    try:
        output = subprocess.check_output(cmd.split())
    except subprocess.CalledProcessError as ex:
        print('%s%s[error]%s %s' % (BOLD, RED, ENDC, ex))
        sys.exit(ex.returncode)

def log(str):
    print('%s[info]%s %s' % (GREEN, ENDC, str))


if len(sys.argv) != 3:
    print('Wrong variables number', end='. ')
    print('Usage: resizer.py DIRECTORY_WITH_PHOTOS HIGHEST_DIMENSION')
    sys.exit(1);

current_dir = os.path.dirname(os.path.realpath(__file__))
photos_dir = sys.argv[1] if sys.argv[1].startswith('/') else current_dir + '/' + sys.argv[1]
photos_dir = os.path.realpath(photos_dir)

# check for directory existance
if not os.path.isdir(photos_dir):
    print('Specified directory does not exist')
    sys.exit(1);

# check for good dimension
dimension = int(sys.argv[2])
if dimension < 1024:
    print('Wrong width/height used. At least 1024 should be used')
    sys.exit(1);

log('Current script directory: %s' % current_dir)
log('Photos directory: %s' % photos_dir)
print()

originals = []
for root, dirnames, filenames in os.walk(photos_dir, followlinks=True):
    for filename in filenames:
        if filename.endswith(SUPPORTED_EXTENSIONS):
            photo_path = os.path.join(root, filename)
            split_photo_path = os.path.splitext(filename)
            photo_copy_path = os.path.join(root, '%s_copy%s' % split_photo_path)

            log('Original: %s' % photo_path)
            log('Copy: %s' % photo_copy_path)
            originals.append(photo_path)

            log('Start resizing...')
            sysrun('convert %s -resize %sx%s %s' % (photo_path, dimension, dimension, photo_copy_path))
            log('Done!')
            print()

sysrun('open %s' % photos_dir)
choice = input('Would you like to delete original photos? (y/N) ')

if choice.lower() == 'y':
    for file_path in originals:
        log('Delete %s...' % file_path)
        os.remove(file_path)