Longest run/island of a number in Python

Question

I have an array with 0\'s repeating multiple times but I want to find the longest set of 0s. For example:

myArray= [[1,0],[2,0],[3,0][4,0][5,1][6,0][7,0][8,0][9,         


        

Answer 1

You can start by numbering the consecutive elements in a for loop and then simply get the index of the maximum value.

>>> cv, a = [], 0
>>> for x in myArray:
>>>     if x[1] == 0:
>>>         a += 1
>>>     else:
>>>         a = 0
>>>     cv.append(a)
>>> print(a)
[1, 2, 3, 4, 0, 1, 2, 3, 4, 5, 6, 7, 0, 0, 1, 2, 3, 4, 0, 1]

>>> mi = cv.index(max(cv))  # finds index of *first* maximum
>>> run = [mi - cv[mi] + 1, mi]
>>> print(run)
[5, 11]