Grabs all DNG files from the connected Android device's camera roll

grabdng.py

#!/usr/bin/python

import argparse, os, subprocess

# Grab the script directory to use as default
current_directory = os.path.dirname(os.path.abspath(__file__))

def parse_cli_arguments():
	parser = argparse.ArgumentParser(description = 'Grabs all DNG files from the connected Android device\'s camera roll.')
	parser.add_argument('--output-path', type = str, help = 'The path to download the DNGs to. Default: {script_path}/raw', 
		default = os.path.join(current_directory, 'raw'))
	parser.add_argument('-o', '--overwrite', help = 'If set, overwrites any existing file. Default: don\'t overwrite')
	
	return parser.parse_args()

args = parse_cli_arguments()

print "Listing files on your device..."
result = subprocess.check_output(['adb', 'shell', 'ls', '/sdcard/DCIM/Camera/'])

print "Downloading DNGs..."

output_path = args.output_path
if not os.path.exists(output_path):
    os.makedirs(output_path)

overwrite = args.overwrite

only_dng = lambda el: el.endswith('.dng')

for filename in filter(only_dng, result.split("\n")):
    source_path = "/sdcard/DCIM/Camera/{filename}".format(filename = filename)
    dest_path = os.path.join(output_path, line)
    
    if overwrite or not os.path.exists(dest_path):
        subprocess.call(['adb', 'pull', source_path, dest_path])

print "Done!"