"""
Queue class
"""
class Queue:
"""
A simple implementation of a FIFO queue.
"""
def __init__(self):
"""
Initialize the queue.
"""
self._items = []
def __len__(self):
"""
Return the number of items in the queue.
"""
return len(self._items)
def __iter__(self):
"""
Create an iterator for the queue.
"""
for item in self._items:
yield item
def __str__(self):
"""
Return a string representation of the queue.
"""
return str(self._items)
def enqueue(self, item):
"""
Add item to the queue.
"""
self._items.append(item)
def dequeue(self):
"""
Remove and return the least recently inserted item.
"""
return self._items.pop(0)
def clear(self):
"""
Remove all items from the queue.
"""
self._items = []
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