How do I rotate a string to the right until every letter has been rotated?

Question

I want to rotate a word to the right, so that every letter has passed.

What I tried to do is make a function. It looks like this (yeah yeah ik lmao):

word = "Abobus";

length = len(word);

n = 1;

def rotation():
    for i in range(length + 1):
        c = word[0 : length-n] + word[length-n:]
        print(c)

rotation();

I needed the output to be:

Abobus
sAbobu
usAbob
busAbo
obusAb
bobusA
Abobus

Instead, the output was:

Abobus
Abobus
Abobus
Abobus
Abobus
Abobus
Abobus

What exactly am I doing wrong?

Asked By: RegularClique

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Source

Answer 1

You are splitting at an index in word, but then just putting the two pieces back together. Also, you are not use i to move the split index.

def rotation(word):
    length = len(word)
    for i in range(length):
        c = word[-i:] + word[:-i]
        print(c)

rotation('Abobus')
# prints:
Abobus
sAbobu
usAbob
busAbo
obusAb
bobusA

Answered By: James

Answer 2

I changed the logic of the program you have written..
This will work

word = "Abobus"

def rotation():
    print(word)
    n = len(word) - 1
    for _ in range(len(word)):
        c = word[n:] + word[0: n]
        n -= 1
        print(c)

rotation()

Answered By: Vikash

Answer 3

Another option (which has potential to be more efficient when working with large inputs) is to use collections.deque which is optimized for such operations:

import collections

word = "Abobus"
word_as_deque = collections.deque("Abobus")

for _ in word:
    print("".join(word_as_deque))
    word_as_deque.appendleft(word_as_deque.pop())

## output:
Abobus
sAbobu
usAbob
busAbo
obusAb
bobusA

Answered By: Tomer Ariel

Answer 4

To rotate a word to the right, you can use slicing to extract the last letter of the word and append it to the beginning of the word. Here’s how you can do it:

def rotate_word(word):
    rotated_word = word[-1] + word[:-1]
    return rotated_word

word = "Abobus"
print(rotate_word(word)) # prints "sAbobu"

To get all the rotated versions of the word, you can use a loop to call the rotate_word function multiple times. Here’s an example of how you can do that:

def rotate_word(word):
    rotated_word = word[-1] + word[:-1]
    return rotated_word

def get_rotated_words(word):
    for i in range(len(word)):
        rotated_word = rotate_word(word)
        word = rotated_word
        print(word)

word = "Abobus"
get_rotated_words(word)

or you can use this code(same code but its like your way):

def rotation(word):
    for i in range(len(word)):
        rotated_word = word[-1] + word[:-1]
        word = rotated_word
        print(word)

word = "Abobus"
rotation(word)

Answered By: Mwm Keshan

How do I rotate a string to the right until every letter has been rotated?

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