Python - Consecutive Ranges of K greater than N

# Python3 code to demonstrate working of
# Consecutive Ranges of K greater than N
# Using loop

# initializing list
test_list = [2, 6, 6, 6, 6, 5, 4, 6, 
             6, 8, 4, 6, 6, 6, 2, 6]

# printing original list
print("The original list is : " + str(test_list))

# initializing K
K = 6

# initializing N
N = 3

res = []
strt, end = 0, 0
prev = 1
for idx, ele in enumerate(test_list):

    # if ele K assign end
    if ele == K:
        end = idx

        # if prev ele not K, reassign start
        if prev != K:     # previous item one
            strt = idx
    else:

        # if range is greater than N, append to result
        if prev == K and end - strt + 1 >= N:
            res.append((strt, end))
    prev = ele

# printing result
print("The extracted ranges : " + str(res))

# Python3 code to demonstrate working of
# Consecutive Ranges of K greater than N
# Using enumerate() + zip() + list slice + list comprehension

# initializing list
test_list = [2, 6, 6, 6, 6, 5, 4, 6, 
             6, 8, 4, 6, 6, 6, 2, 6]

# printing original list
print("The original list is : " + str(test_list))

# initializing K
K = 6

# initializing N
N = 3

# getting break pairs indices
brk_pairs = [idx for idx, (x, y) in enumerate(
    zip(test_list, test_list[1:]), 
  1) if (x == K) != (y == K)]

# The ranges are checked for size required
res = [(idx, ele - 1) for idx, ele in zip([K] + brk_pairs, 
                                          brk_pairs + [len(test_list)])
       if ele - idx >= N and test_list[idx] == K]

# printing result
print("The extracted ranges : " + str(res))