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def flat_list(array):
    array = str(array)
    array = array.replace('[', '')
    array = array.replace(']', '')
    array =  array.split(', ')
    for idx, item in enumerate(array):
        if len(item) == 0:
            del array[idx]
        else:
            array[idx] = int(array[idx])
    return array

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