VeldaKiara

# Queue implementation 
class Queue:

    def __init__(self):
        self.queue = []

    # Add an element
    def enqueue(self, item):
        self.queue.append(item)

VeldaKiara

nums = [0, 0, 1, 1, 2, 2, 3, 3, 4]

#using list comprehension to remove duplicates
non_dup = []
[non_dup.append(x) for x in nums if x not in non_dup]

print(str(non_dup))
print(len(non_dup))