[ Write a Python program to find the second smallest number in a list. ]
def second_smallest(numbers): if (len(numbers)<2): return if ((len(numbers)==2) and (numbers[0] == numbers[1]) ): return dup_items = set() uniq_items = [] for x in numbers: if x not in dup_items: uniq_items.append(x) dup_items.add(x) uniq_items.sort() return uniq_items[1] print(second_smallest([1, 2, -8, -2, 0, -2]))
print(second_smallest([1, 1, 0, 0, 2, -2, -2]))
print(second_smallest([1, 1, 1, 0, 0, 0, 2, -2, -2]))
print(second_smallest([2,2]))
print(second_smallest([2]))
