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Python: Rotate a given list by specified number of items to the right or left direction

Python List: Exercise - 109 with Solution

Write a Python program to rotate a given list by a specified number of items in the right or left direction.

Sample Solution:

Python Code:

nums1 = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
print("original List:")
print(nums1)
print("\nRotate the said list in left direction by 4:")
result = nums1[3:] + nums1[:4]
print(result)
print("\nRotate the said list in left direction by 2:")
result = nums1[2:] + nums1[:2]
print(result)
print("\nRotate the said list in Right direction by 4:")
result = nums1[-3:] + nums1[:-4]
print(result)
print("\nRotate the said list in Right direction by 2:")
result = nums1[-2:] + nums1[:-2]
print(result)

Sample Output: 

original List:
[1, 2, 3, 4, 5, 6, 7, 8, 9, 10]

Rotate the said list in left direction by 4:
[4, 5, 6, 7, 8, 9, 10, 1, 2, 3, 4]

Rotate the said list in left direction by 2:
[3, 4, 5, 6, 7, 8, 9, 10, 1, 2]

Rotate the said list in Right direction by 4:
[8, 9, 10, 1, 2, 3, 4, 5, 6]

Rotate the said list in Right direction by 2:
[9, 10, 1, 2, 3, 4, 5, 6, 7, 8]

Flowchart:

Flowchart: Rotate a given list by specified number of items to the right or left direction.

Visualize Python code execution:

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Python Code Editor:

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Python: Tips of the Day

Chunks a list into smaller lists of a specified size:

Example:

from math import ceil

def tips_chunk(lst, size):
  return list(
    map(lambda x: lst[x * size:x * size + size],
      list(range(0, ceil(len(lst) / size)))))

print(tips_chunk([1, 2, 3, 4, 5, 6], 3))

Output:

[[1, 2, 3], [4, 5, 6]]