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Program to cyclically rotate an array by one in Python | List Slicing

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  • Last Updated : 25 Jul, 2022
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Given an array, cyclically rotate the array clockwise by one. Examples:

Input:  arr = [1, 2, 3, 4, 5]
Output: arr = [5, 1, 2, 3, 4]

We have existing solution for this problem please refer Program to cyclically rotate an array by one link. We will solve this problem in python quickly using List Comprehension. Approach is very simple, just remove last element in list and append it in front of remaining list. 

Python3




# Program to cyclically rotate an array by one
 
def cyclicRotate(input):
      
     # slice list in two parts and append
     # last element in front of the sliced list
      
     # [input[-1]] --> converts last element pf array into list
     # to append in front of sliced list
 
     # input[0:-1] --> list of elements except last element
     print ([input[-1]] + input[0:-1])
 
# Driver program
if __name__ == "__main__":
    input = [1, 2, 3, 4, 5]
    cyclicRotate(input)

Output:

[5, 1, 2, 3, 4]

Time Complexity: O(n) 
Auxiliary Space: O(1)

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