I am building a music store example in python. I am trying to find a way of displaying the total of all of the sales of all of the music.

Everything is stored in objects in a list trackList. Track is the object so track.sales returns the sales of particular track.

This is what I have so far:

Code:
def totalSales(trackList):
    for track in trackList:
        total = sum(track.sales)
...