Python download RSS podcast

download.py

import feedparser
import sys
import urllib2
import os.path

'''
Download all mp3 from rss podcast in current directory
program usage:
python download.py http://url/podcast.rss
'''

def download(url, filename):
    if os.path.isfile(filename):
        print("file %s already exist" % filename)
        return
    u = urllib2.urlopen(url)
    meta = u.info()
    filesize = int(meta.getheaders("Content-Length")[0])
    print "Downloading: %s Bytes: %s" % (filename, filesize)
    dl = 0
    with open(filename, 'wb') as f:
        while True:
            buff = u.read(8192)
            if not buff:
                break
            dl += len(buff)
            f.write(buff)
            status = r"\r%10d  [%3.2f%%]" % (dl, dl * 100. / filesize)
            status = status + chr(8)*(len(status)+1)
            sys.stdout.write(status)
    print("[ok]")

if __name__ == '__main__':
    if len(sys.argv)<2:
        print("Program use python download.py http://myurl/podcast.rss")
    else:
        d = feedparser.parse(sys.argv[1])
        for item in d.entries:
            title = item['title']
            url = item.enclosures[0].href
            download(url,title+".mp3")