Exercise:

How does the queue "peek" operation work?

class Queue:
    def __init__(self):
        self.queue = []
    
    def enqueue(self, element):
        self.queue.append(element)
    
    def dequeue(self):
        if self.isEmpty():
            return "Queue is empty"
        return self.queue.pop(0)
    
    def peek(self):
        if self.isEmpty():
            return "Queue is empty"
        return self.queue[
w3exercise_input_no_0
]
    
    def isEmpty(self):
        return len(self.queue) == 0
    
    def size(self):
        return len(self.queue)