Convert milliseconds to timedelta object (duration)

Track Duration.md

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

Thanks for the gist. Is there another method that converts the duration according to a specific pattern? For example, it will take milliseconds and convert it to minutes and seconds only. An approach that doesn't care about the remaining milliseconds.

E.g

duration: 204320 ms -> 03:23