["python","algorithm","list","sorting"]
Pythonic way to check if a list is sorted or not

Is there a pythonic way to check if a list is already sorted in ASC or DESC listtimestamps = [1, 2, 3, 5, 6, 7] something like isttimestamps.isSorted() that returns True or False. I want to input a list of timestamps for some messages and check if the the transactions appeared in the correct order.
Here is a one liner: all(l[i] <= l[i+1] for i in range(len(l) - 1)) If using Python 2, use xrange instead of range. For reverse=True, use >= instead of <=.