简单循环

names=['yangyuying','zilingxi','ziye','muziyi']
for name in names:
    print(name)

>>>
yangyuying
zilingxi
ziye
muziyi


i=0
while i<3:
    i+=1
    print(i)

>>>
1
2
3

for i in range(5):
    print(i)

>>>
0
1
2
3
4

actor=[['黄景瑜','刘昊然','吴亦凡'],['朴海镇','宋钟基','朴灿烈']]
for i in actor:
    for j in i:
        print(j)
>>>
黄景瑜
刘昊然
吴亦凡
朴海镇
宋钟基
朴灿烈