def trim(s):
while s[:1] == ' ':
s = s[1:]
while s[-1:] == ' ':
s = s[:-1]
return s
哇 真的简洁
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梦魇
def trim(s):
while s[:1] == ' ':
s = s[1:]
while s[-1:] == ' ':
s = s[:-1]
return s