Python: Rotate a Deque Object specified number (positive) of times

Last update on March 28 2025 12:56:53 (UTC/GMT +8 hours)

13. Rotate a Deque a Specified Number (Positive) of Times

Write a Python program to rotate a Deque Object a specified number (positive) of times.

Sample Solution:

Python Code:

# Import the collections module to use the deque data structure
import collections

# Declare an empty deque object named 'dq_object'
dq_object = collections.deque()

# Add elements to the deque from left to right
dq_object.append(2)
dq_object.append(4)
dq_object.append(6)
dq_object.append(8)
dq_object.append(10)

# Print a message to indicate the display of the deque before rotation
print("Deque before rotation:")

# Print the content of 'dq_object'
print(dq_object)

# Rotate the deque once in the positive direction (to the right)
dq_object.rotate()

# Print a message to indicate the display of the deque after 1 positive rotation
print("\nDeque after 1 positive rotation:")

# Print the content of 'dq_object' after one rotation
print(dq_object)

# Rotate the deque twice in the positive direction (to the right)
dq_object.rotate(2)

# Print a message to indicate the display of the deque after 2 positive rotations
print("\nDeque after 2 positive rotations:")

# Print the content of 'dq_object' after two rotations
print(dq_object) 

Sample Output:

Deque before rotation:
deque([2, 4, 6, 8, 10])

Deque after 1 positive rotation:
deque([10, 2, 4, 6, 8])

Deque after 2 positive rotations:
deque([6, 8, 10, 2, 4])

Flowchart:

For more Practice: Solve these Related Problems:

• Write a Python program to rotate a deque by one position to the right using the rotate() method and print the result.
• Write a Python program to implement multiple positive rotations on a deque and display the final order of elements.
• Write a Python program to use a loop to perform positive rotations on a deque, printing the deque after each rotation.
• Write a Python program to compare the results of a single large positive rotation versus multiple small rotations that add up to the same value.

Python Code Editor:

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