We hope that this EDUCBA information on “Deque in Python” was beneficial to you. From this article, we learned how and when we use the Deque in python. From the above article, we have learned the basic syntax of Deque and we also see different examples of Deque. We hope from this article you learn the Deque in python. The end out we illustrate by using the following screenshot as follows. After we use rotate() and reverse() function as shown in above example. In the above example, we implement different operations as follows.Įxtend() function it extends the list at the right side. Print('After rotation operation the deque is : ') Now perform extend(), rotate() and reverse() function as follows. The end out we illustrate by using the following screenshot as follows.Īfter that we perform the count() and remove() function. The end out we illustrate by using the following screenshot as follows.Īfter that, we perform the insert operation at a specified index. Print('insert 10 item at 5th position : ')Įxplanation In the above example, we try to implement index-related functions as shown in the above example. First, we perform the index() function. # using insert() to insert the value 5 at 10th position # using index() to print the first occurrence of 8 Now let’s see the index-related examples with operation as follows. The end out we illustrate by using the following screenshot as follows.Īfter that, we perform the popleft operation on deque which means we delete items from the left side of the deque. The end out we illustrate by using the following screenshot as follows.Īfter that, we perform the pop operation on deque which means we delete items from the right side of the deque. The end out we illustrate by using the following screenshot as follows.Īfter that, we perform the appendleft operation on deque that means insert an item at the left side of the deque. The first operation we perform append at the right side of the deque. First, we declared the deque with an item as shown in the above code. In the above example, we try to implement different functions. Print('pop item from left side of deque:') Print('After deletion the operation the deque is:') Print('After appendleft the operation the deque is:') Print('After append at right operation the deque is:') Now perform append(), appendleft(), pop() and popleft() as follows. Now let’s see the different operations of deque as follows. The end out of the above code we illustrate by using the following screenshot as follows. After that, we declare the deque and finally, we print the value of the data variable as shown in the above code.

In the above example, we try to implement deque, here first we need to import the deque from the collection library. from collections import dequeĭata = deque()

Now first create a simple deque by using the following code as follows. Now let’s see the different examples of deque in python as follows.

invert(): It is used to reverse the request for the deque.

A positive worth pivots it to one side, while a negative worth turns it to one side.

rotate(n): It is used to rotate the deque a number of times.index(e, start, end): It is used to search the given item from start to finish and return the file of the primary event.count(value): It is used to return the absolute number of occurrences of the mentioned value.remove(value): It is used to remove items from the first occurrence of value that is mentioned.popleft(): It is used to remove items from the left side of deque.Pop(): It is used to remove items from the right side of deque.extendleft(list): This function works the same as extend() function, yet it inverts the list of qualities passed as the contention and afterward adds that list to the left side of the deque.It accepts a list of qualities as a contention. extend(list): This is used to add the multiple values to the right end in deque.insert(specified index, value): This is used to add the value at the specified index given by the user.appendleft(item): This is used to add the item to the left end in deque.append(item): This is used to add the item to the right end in deque.The below-mentioned parameters are used to implement the deque as follows. Execution of a deque in Python is accessible in the collections module. Now let’s see how deque works in python as follows.Ī deque is a double-ended component where components can be both inserted and deleted from either the left or the right end of the queue. After that we define the list with deque keywords as shown in the above syntax, the list contains the different strings that is string1, string2, and string3. In the above syntax, we use an in-built method to implement the deque, here first we need to import the deque from the collection data structure.

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