![](https://cos-cdn.shuashuati.com/pipixue-wap/2020-1230-1107-56/ti_inject-812ce.png)
代码: >>> lst = [('a', 'c'), ('3', '8'), ('2', '1'), ('f', 'g'), ('12', '7')] >>> lst.sort() 执行后的lst为: A. [ ('2', '1'), ('3', '8'),('12', '7'),('a', 'c'), ('f', 'g')] B. [('12', '7'), ('2', '1'), ('3', '8'), ('a', 'c'), ('f', 'g')] C. [('a', 'c'),('f', 'g'),('2', '1'), ('3', '8'),('12', '7')] D. [('a', 'c'),('f', 'g'),('12', '7'),('2', '1'), ('3', '8')]