Batch compress PNG images by using TinyPNG

tinyPNG.py

"""
    Batch compress PNG images by using TinyPNG
    usage: 
        tinyPNG.py <key> <target-folder> <source-file>...
"""
import os
import glob
import sys
import re
import shutil
from urllib.request import Request, urlopen
from base64 import b64encode
from docopt import docopt
  
if __name__ == '__main__':
    args = docopt(__doc__)
    key = args['<key>']
    files = args['<source-file>']
    target = os.path.abspath(args['<target-folder>'])
 
    for idx, source in enumerate(files):
        name = os.path.basename(source)
        expr = re.compile(r'.+\.png')
        match = expr.match(name)
        if match is None:
            print("%d/%d Skipped %s" % (idx + 1, len(files), source))
            continue
 
        request = Request("https://api.tinify.com/shrink", open(source, "rb").read())
        auth = b64encode(bytes("api:" + key, "ascii")).decode("ascii")
        request.add_header("Authorization", "Basic %s" % auth)

        response = urlopen(request)

        if response.status == 201:
            # Compression was successful, retrieve output from Location header.
            result = urlopen(response.getheader("Location")).read()
            open(target + "/" + name, "wb").write(result)
            print("%d/%d Compressed %s" % (idx + 1, len(files), source))
        else:
            # Something went wrong! You can parse the JSON body for details.
            print("%d/%d failed %s" % (idx + 1, len(files), source))