largest_product_5_consecutive.py

import operator

number ="7316717653133062491922511967442657474235534919493496983520312774506326239578318016984801869478851843858615607891129494954595017379583319528532088055111254069874715852386305071569329096329522744304355766896648950445244523161731856403098711121722383113622298934233803081353362766142828064444866452387493035890729629049156044077239071381051585930796086670172427121883998797908792274921901699720888093776657273330010533678812202354218097512545405947522435258490771167055601360483958644670632441572215539753697817977846174064955149290862569321978468622482839722413756570560574902614079729686524145351004748216637048440319989000889524345065854122758866688116427171479924442928230863465674813919123162824586178664583591245665294765456828489128831426076900422421902267105562632111110937054421750694165896040807198403850962455444362981230987879927244284909188845801561660979191338754992005240636899125607176060588611646710940507754100225698315520005593572972571636269561882670428252483600823257530420752963450"

product = 0

numbers = list(number)
numbers = [int(x) for x in numbers]

lower_limit = 0
upper_limit = 5 
max_prod = 0
while (upper_limit <= len(numbers)):
    if 0 in numbers[lower_limit:upper_limit]:
        lower_limit = lower_limit + 1
        upper_limit = upper_limit + 1
        continue
    else:
        tmp = reduce(operator.mul,numbers[lower_limit:upper_limit])
        if tmp > max_prod:
            max_prod = tmp
        lower_limit = lower_limit + 1
        upper_limit = upper_limit + 1

print max_prod