Python list sort in descending order

Question

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         


        

Answer 1

In one line, using a lambda:

timestamp.sort(key=lambda x: time.strptime(x, '%Y-%m-%d %H:%M:%S')[0:6], reverse=True)

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Passing a function to list.sort:

def foo(x):
    return time.strptime(x, '%Y-%m-%d %H:%M:%S')[0:6]

timestamp.sort(key=foo, reverse=True)