collection_mystery8

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< collection_mystery7

collection_mystery9 >

Main Page → Exercises → Python → Solve an Exercise

Language/Type: Python collections list

Write the output produced by the following function when passed each of the following stacks:

def collection_mystery8(stack):
    queue = []
    myset = []
    while len(stack) != 0:
        n = stack.pop()
        if n % 2 == 0:
            queue.append(n)
        elif n not in myset:
            myset.add(n)
    for n in myset:
        stack.append(n)
    while len(queue) != 0:
        stack.append(queue.pop(0))
    print(stack)

`[1, 2, 3, 4, 5]`
`[3, 2, 7, 3, 3, 4, 1, 1, 4]`
`[9, 7, 14, 7, 22, 7, 3, 14]`
`[8, 5, 1, 2, 1, 1, 2, 1, 4, 5]`

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