python怎样判断三个字符串.相同的字符有哪些

Question

字符串a=6171156
字符串b=1564687
字符串c=1679813
字符串数值范围是0-9可重复
要怎样判断三个字符串同时存在6.1

Answer 1

三个字符串转集合求交集

a = '6171156'
b = '1564687'
c = '1679813'

set(a) & set(b) & set(c)

// {'7', '6', '1'}