How can I sort this list in descending order?
timestamp = [ \"2010-04-20 10:07:30\", \"2010-04-20 10:07:38\", \"2010-04-20 10:07:52\", \"2010
This will give you a sorted version of the array.
sorted(timestamp, reverse=True)
If you want to sort in-place:
timestamp.sort(reverse=True)