FilesExpand file tree

 master

/

rotate.py

Copy path

Blame

More file actions

Blame

More file actions

Latest commit

 

History

History

History

52 lines (37 loc) · 1003 Bytes

 master

/

rotate.py

Copy path

Top

File metadata and controls

• Code
• Blame

52 lines (37 loc) · 1003 Bytes

Raw

Copy raw file

Download raw file

Open symbols panel

Edit and raw actions

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

50

51

52

"""This module contains a code example related to

Think Python, 2nd Edition

by Allen Downey

http://thinkpython2.com

Copyright 2015 Allen Downey

License: http://creativecommons.org/licenses/by/4.0/

"""

from __future__ import print_function, division

def rotate_letter(letter, n):

"""Rotates a letter by n places. Does not change other chars.

letter: single-letter string

n: int

Returns: single-letter string

"""

if letter.isupper():

start = ord('A')

elif letter.islower():

start = ord('a')

else:

return letter

c = ord(letter) - start

i = (c + n) % 26 + start

return chr(i)

def rotate_word(word, n):

"""Rotates a word by n places.

word: string

n: integer

Returns: string

"""

res = ''

for letter in word:

res += rotate_letter(letter, n)

return res

if __name__ == '__main__':

print(rotate_word('cheer', 7))

print(rotate_word('melon', -10))

print(rotate_word('sleep', 9))