Hands-On Data Structures and Algorithms with Python - Second Edition

Enqueue operation

The enqueue method is to add items to the queue. This method is very simple and only receives the data to append to the queue. This data is then passed to the append method of the inbound_stack in the queue class. Further, the append method is used to mimic the push operation, which pushes elements to the top of the stack. The following code is the implementation of enqueue using the stack in Python:

def enqueue(self, data):     self.inbound_stack.append(data) 

To enqueue data onto the inbound_stack, the following code does the job:

queue = Queue() queue.enqueue(5) queue.enqueue(6) queue.enqueue(7) print(queue.inbound_stack)

A command-line output of the inbound_stack inside the queue is as follows:

[5, 6, 7]