1. split、rsplit的用法
split(分隔符,分割几次)从左向右寻找
rsplit(分隔符,分割几次)从右向左寻找
a = "dlrblist"
a1 = a.split("l")
a2 = a.split("l", maxsplit=1) # maxsplit表示分割几次
a3 = a.rsplit("l", maxsplit=1) # maxsplit表示分割几次
print("a1:",a1)
print("a2:",a2)
print("a3:",a3)
a1: ['d', 'rb', 'ist']
a2: ['d', 'rblist']
a3: ['dlrb', 'ist']