How do I rotate an array in Python?

How do I rotate an array in Python?

You can rotate an array in Python using slicing. For example, to rotate an array arr by k positions, you can do: arr = arr[k:] + arr[:k].

What if I want to rotate it to the left instead of the right?

To rotate it to the left, you can use the same slicing method but adjust the indices. For left rotation by k, use: arr = arr[k:] + arr[:k].

Can you show me a complete function for rotating an array?

Sure! Here's a function:

def rotate_array(arr, k):
    k = k % len(arr)  # Handle rotations greater than array length
    return arr[k:] + arr[:k]

How do I handle negative values for k?

For negative values of k, you can convert it to a positive rotation by adding the length of the array: k = (k % len(arr)) + len(arr).