6_Number in list.py

# Numbers in lists by SeanMc from forums
# define a procedure that takes in a string of numbers from 1-9 and
# outputs a list with the following parameters:
# Every number in the string should be inserted into the list.
# If the first number in the string is greater than or equal
# to the proceeding number, the proceeding number should be inserted
# into a sublist. Continue adding to the sublist until the proceeding number
# is greater than the first number before the sublist.
# Then add this bigger number to the normal list.

#Hint - "int()" turns a string's element into a number

def numbers_in_lists(string):
    finallist=[int(string[0])]
    sublist=[]

    for i in string:
        if int(i)>finallist[-1] and i != string[0]:
            if sublist:
                finallist.append(sublist)
                sublist=[]
            finallist.append(int(i))
        elif i != string[0]:
            sublist.append(int(i))

    if sublist:
        finallist.append(sublist)

    return finallist




#testcases
string = '543987'
result = [5,[4,3],9,[8,7]]
print  repr(string), numbers_in_lists(string)== result
string= '987654321'
result = [9,[8,7,6,5,4,3,2,1]]
print repr(string), numbers_in_lists(string) == result
string = '455532123266'
result = [4, 5, [5, 5, 3, 2, 1, 2, 3, 2], 6, [6]]
print repr(string),   numbers_in_lists(string) == result
string = '123456789'
result = [1, 2, 3, 4, 5, 6, 7, 8, 9]
print repr(string), numbers_in_lists(string) == result