Download files with urllib2. Display percentage of file downloaded based off of bytes. Write file chunks instead of holding data in memory. Awesome.

download.py

import urllib2
import sys

url = "http://example.com/file.mp3"

request = urllib2.urlopen(url)
file = open('file.mp3', 'wb')
filesize = int(request.info().getheaders("Content-Length")[0])

print "Downloading: %s Bytes: %s" % (url.split('/')[-1], filesize)

size = 0
block_sz = 131072
while True:
    buffer = request.read(block_sz)
    if not buffer:
        break
    size += len(buffer)
    percentage = float(float(size) / float(filesize)) * 100
    file.write(buffer)
    print "Downloaded: " + ("%.2f" % percentage) + " %\t\t\r",
    sys.stdout.flush()

file.close()
print "Finished!".ljust(20, ' ')

thanks