To rotate a letter (lowercase) means to shift it through the alphabet, wrapping around to the beginning if necessary, so ‘a’ rotated by 3 is ‘d’ and ‘a’ rotated by -1 is ‘z’. To rotate a word (all letters are lowercase), rotate each letter by the same amount. For example, “cheer” rotated by 7 is “jolly” and “melon” rotated by -10 is “cubed”. You might want to use the built-in function ord, which converts a character to a integer code, and chr, which converts integer codes to characters. Letters of the alphabet are encoded in alphabetical order, so for example: ord('c') - ord('a') == 2. Because 'c' is the two-eth letter of the alphabet. Input A string and an integer. Output A new string.
时间: 2024-01-05 17:03:02 浏览: 333
将字母倒过来排
Sure, I understand your question. You want me to create a program that can rotate a lowercase string by a certain amount, which means shifting each letter through the alphabet by the same amount and wrapping around to the beginning if necessary. Here's the code:
```python
def rotate_word(word, rotation):
new_word = ""
for letter in word:
new_letter = chr(((ord(letter) - ord('a') + rotation) % 26) + ord('a'))
new_word += new_letter
return new_word
```
The `rotate_word` function takes two parameters: a string `word` and an integer `rotation`. It then loops through each letter in the word, calculates the new letter by adding the rotation to the original letter's position in the alphabet, and then converts the new position back to a letter using the `chr` function. The `% 26` ensures that the position wraps around to the beginning if necessary, and the `+ ord('a')` converts the position back to a letter in the lowercase alphabet. Finally, the new letter is added to a new string `new_word`, which is then returned.
You can call this function with your own string and rotation values to test it out. Let me know if you have any other questions!
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