Log in from a computer to take this course

You'll need to log in from a computer to start Technical Interview Practice with Python. But you can practice or keep up your coding streak with the Codecademy Go app. Download the app to get started.

apple storegoogle store
Learn

For our first problem, we would like to “rotate” a list, or move elements forward in a list by a number of spaces, k.

Elements at the greatest index will “wrap around” to the beginning of the list.

list = ['a', 'b', 'c', 'd', 'e', 'f'] rotate(list, 0) # ['a', 'b', 'c', 'd', 'e', 'f'] rotate(list, 1) # ['f', 'a', 'b', 'c', 'd', 'e'] rotate(list, 3) # ['d', 'e', 'f', 'a', 'b', 'c']

Clarifying Questions:

  • Are there constraints on time or space efficiency?
    • Nope! Just solve the problem.
  • Should I account for negative inputs?
    • The rotation input will always be positive.
  • What if the rotation is greater than the list length?
    • Continue wrapping!
    • The “rotated” list would be the same as the original when k is equal to the length.

Instructions

1.

Write a function rotate(), with the parameters my_list and num_rotations.

rotate() should return the input list rotated num_rotations forward.

Sign up to start coding

Mini Info Outline Icon
By signing up for Codecademy, you agree to Codecademy's Terms of Service & Privacy Policy.

Or sign up using:

Already have an account?