Use time deltas to convert milliseconds into duration. http://docs.python.org/2/library/datetime.html#datetime.timedelta
from datetime import timedelta
# Convert 600000ms (10 minutes) back to duration value.
milliseconds = timedelta(milliseconds=600000)
print milliseconds
# 0:10:00
itunes have a rss feed of their top songs, I would use this to get the daily top 100. This is the feed you want https://itunes.apple.com/gb/rss/topsongs/limit=100/json and this is the generator https://rss.itunes.apple.com/gb/.
{"feed":{"author":{"name":{"label":"iTunes Store"}, "uri":{"label":"http://www.apple.com/uk/itunes/"}}, "entry":{"im:name":{"label":"Wrecking Ball"}, "im:image":[
{"label":"http://a166.phobos.apple.com/us/r30/Music/v4/7f/c5/85/7fc58500-1dd8-6581-2524-c07870b7defa/886444193757.55x55-70.jpg", "attributes":{"height":"55"}},
{"label":"http://a888.phobos.apple.com/us/r30/Music/v4/7f/c5/85/7fc58500-1dd8-6581-2524-c07870b7defa/886444193757.60x60-50.jpg", "attributes":{"height":"60"}},
{"label":"http://a231.phobos.apple.com/us/r30/Music/v4/7f/c5/85/7fc58500-1dd8-6581-2524-c07870b7defa/886444193757.170x170-75.jpg", "attributes":{"height":"170"}}], "im:collection":{"im:name":{"label":"Wrecking Ball - Single"}, "link":{"attributes":{"rel":"alternate", "type":"text/html", "href":"https: