正则表达式示例：
import remy_str = "abcdefgfaabbbffbbbbbbfgbb"len(max(re.compile("(b+b)*").findall(my_str))) #changed the regex from (b+b) to (b+b)*# max([len(i) for i in re.compile("(b+b)").findall(my_str)]) also works编辑，我的与同伴
x=timeit.Timer(stmt='import itertools;my_str = "abcdefgfaabbbffbbbbbbfgbb";max(len(list(y)) for (c,y) in itertools.groupby(my_str) if c=="b")')x.timeit()22.759046077728271x=timeit.Timer(stmt='import re;my_str = "abcdefgfaabbbffbbbbbbfgbb";len(max(re.compile("(b+b)").findall(my_str)))')x.timeit()8.4770550727844238
