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Dumping queue into list or array in Python

Last Updated : 23 Jul, 2025
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Prerequisite: Queue in Python

Here given a queue and our task is to dump the queue into list or array. We are to see two methods to achieve the objective of our solution.

Example 1: 

In this example, we will create a queue using the collection package and then cast it into the list

Python3 
# Python program to # demonstrate queue implementation # using collections.dequeue from collections import deque # Initializing a queue q = deque() # Adding elements to a queue q.append('a') q.append('b') q.append('c') # display the queue print("Initial queue") print(q,"\n") # display the type print(type(q))

Output:

Initial queue deque(['a', 'b', 'c']) <class 'collections.deque'>

Let's create a list and cast into it:

Python3 
# convert into list li = list(q) # display print("Convert into the list") print(li) print(type(li))

Output:

Convert into the list ['a', 'b', 'c'] <class 'list'>

Example 2:

In this example, we will create a queue using the queue module and then cast it into the list.

Python3 
from queue import Queue # Initializing a queue que = Queue() # Adding elements to a queue que.put(1) que.put(2) que.put(3) que.put(4) que.put(5) # display the queue print("Initial queue") print(que.queue) # casting into the list li = list(que.queue) print("\nConverted into the list") print(li)

Output:

Initial queue deque([1, 2, 3, 4, 5]) Converted into the list [1, 2, 3, 4, 5]

K
kumar_satyam
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