看榜一原来切片s[:1]还可以等效len()的作用啊,nb
def trim(s): while(len(s) and s[0] == ' '): s = s[1:] while(len(s) and s[-1] == ' '): s = s[:-1] print(s) return s
Sign in to make a reply
v贝塔v
看榜一原来切片s[:1]还可以等效len()的作用啊,nb