Python: A program to find the LENGTH of the longest run in a given list?

Question

Q: A run is a sequence of adjacent repeated values. Given a list, write a function to determine the length of the longest run. For example, for the sequence [1, 2, 5, 5, 3,

Answer 1

Just another way of doing it:

def longestrun(myList):
    sett = set()
    size = 1
    for ind, elm in enumerate(myList):
        if ind > 0:
            if elm == myList[ind - 1]:
                size += 1
            else:
                sett.update([size])
                size = 1
    sett.update([size])
    return max(sett)

myList = [1, 2, 5, 5, 3, 1, 2, 4, 3, 2, 2, 2, 2, 3, 6, 5, 5, 6, 3, 1]
print longestrun(myList)