def get_least_occuring_item_from(array):
    dic = {}
    leastOccuringItem = None

    for item in array:
        if item in dic:
            dic[item] += 1
        else:
            dic[item] = 1

    for key in dic:
        if leastOccuringItem is None:
            leastOccuringItem = key
        elif dic[key] < dic[leastOccuringItem]:
            leastOccuringItem = key

    return leastOccuringItem

arr = ['apple', 'banana', 'apple', 'pear', 'apple', 'pear', 'banana', 'banana']
print(get_least_occuring_item_from(arr))