Leetcode学习(18)—— Detect Capital
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2022-03-09 22:37:57
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Given a word, you need to judge whether the usage of capitals in it is right or not.
We define the usage of capitals in a word to be right when one of the following cases holds:
All letters in this word are capitals, like “USA”.
All letters in this word are not capitals, like “leetcode”.
Only the first letter in this word is capital if it has more than one letter, like “Google”.
Otherwise, we define that this word doesn’t use capitals in a right way.
一句话,你需要判断大写字母的使用是否正确。
当以下情况之一成立时,我们将一个单词中的大写字母的使用定义为正确:
这个词中的所有字母都是大写字母,如“美国”。
这个词中的所有字母都不是大写字母,例如“leetcode”。
只有这个词中的第一个字母是大写字母,如果它有多个字母,如“Google”。
否则,我们定义这个词不以正确的方式使用大写字母。
Example 1:
Input: "USA"
Output: True
Example 2:
Input: "FlaG"
Output: False
Note: The input will be a non-empty word consisting of uppercase and lowercase latin letters.
import re
class Solution(object):
def detectCapitalUse(self, word):
pattern = re.compile(r'[A-Z]{1}')
return_list = pattern.findall(word)
# print(return_list)
if len(return_list) == len(word):
return True
elif len(return_list) == 1 and return_list[0] == word[0]:
return True
elif len(return_list) == 0:
return True
else:
return False