我在做First Unique Character in a String - LeetCode的时候,碰到“SyntaxError: Generator expression must be parenthesized”。
我想知道的是,多个参数时,为什么 Generator expression must be parenthesized ?
# 重现代码
class Solution:
def firstUniqChar(self, s: str) -> int:
char_to_index = {}
for i, c in enumerate(s):
if c in char_to_index:
char_to_index[c] = -1
else:
char_to_index[c] = i
return min(
index for index in char_to_index.values() if index != -1,
default=-1
)
1
jfcherng 2023-01-07 14:32:58 +08:00 1
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