01.01. 判定字符是否唯一
class Solution:
    def isUnique(self, astr: str) -> bool:
       return len(set(astr))==len(astr)
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2022-03-11
01.01. 判定字符是否唯一
class Solution:
    def isUnique(self, astr: str) -> bool:
       return len(set(astr))==len(astr)
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