Euler8.py

numbers = ("73167176531330624919225119674426574742355349194934"
           "96983520312774506326239578318016984801869478851843"
           "85861560789112949495459501737958331952853208805511"
           "12540698747158523863050715693290963295227443043557"
           "66896648950445244523161731856403098711121722383113"
           "62229893423380308135336276614282806444486645238749"
           "30358907296290491560440772390713810515859307960866"
           "70172427121883998797908792274921901699720888093776"
           "65727333001053367881220235421809751254540594752243"
           "52584907711670556013604839586446706324415722155397"
           "53697817977846174064955149290862569321978468622482"
           "83972241375657056057490261407972968652414535100474"
           "82166370484403199890008895243450658541227588666881"
           "16427171479924442928230863465674813919123162824586"
           "17866458359124566529476545682848912883142607690042"
           "24219022671055626321111109370544217506941658960408"
           "07198403850962455444362981230987879927244284909188"
           "84580156166097919133875499200524063689912560717606"
           "05886116467109405077541002256983155200055935729725"
           "71636269561882670428252483600823257530420752963450")


def groups(iterable, group):
    index = 0
    stream = list(iterable)
    stop = len(iterable) + 1

    while index + group < stop:
        yield [int(x) for x in stream[index:index + group]]
        index += 1


def product(iterable):
    result = 1

    for number in iterable:
        result *= number

    return result

if __name__ == '__main__':
    result = 0
    best_group = []

    for group in groups(numbers, 5):
        if product(group) > result:
            result = product(group)
            best_group = group

    print best_group