Download multiple files parallel with multiple threads for each download.

fileDownloader.py

import urllib2
import os
import sys
import time
import threading

urls = ["http://broadcast.lds.org/churchmusic/MP3/1/2/nowords/271.mp3",
"http://s1.fans.ge/mp3/201109/08/John_Legend_So_High_Remix(fans_ge).mp3",
"http://megaboon.com/common/preview/track/786203.mp3"]

url = urls[1]

def downloadFile(url, saveTo=None):
	file_name = url.split('/')[-1]
	if not saveTo:
		saveTo = '/Users/userName/Desktop'
	try:
		u = urllib2.urlopen(url)
	except urllib2.URLError , er:
		print("%s for %s failed to download." % (er.reason, os.path.basename(url)))
	else:
		f = open(os.path.join(saveTo, file_name), 'wb')
		meta = u.info()
		file_size = int(meta.getheaders("Content-Length")[0])
		print "Downloading: %s Bytes: %s" % (file_name, file_size)
		file_size_dl = 0
		block_sz = 8192
		while True:
			buffer = u.read(block_sz)
			if not buffer:
				break

			file_size_dl += len(buffer)
			f.write(buffer)
			status = r"%10d  [%3.2f%%]" % (file_size_dl, file_size_dl * 100. / file_size)
			status = status + chr(8)*(len(status)+1)
			sys.stdout.write('%s\r' % status)
			time.sleep(.2)
			sys.stdout.flush()
			if file_size_dl == file_size:
				print r"Download Completed %s%% for file %s, saved to %s" % (file_size_dl * 100. / file_size, file_name, saveTo,)
		f.close()
		return


def synchronusDownload():
	urls_saveTo = {urls[0]: None, urls[1]: None, urls[2]: None}
	for url, saveTo in urls_saveTo.iteritems():
		th = threading.Thread(target=downloadFile, args=(url, saveTo), name="%s_Download_Thread" % os.path.basename(url))
		th.start()