使用for循环打印python特定的列表索引

Question

I have a list l1 =[1,56,67,79,90,47,08,56,79,84,76,79,68,]

Now, I want to print indices 4,6,9,10 alone using a loop

I tried:

for i in l1:
    Print(i[4]..)

But it says: int is not subscriptable

Answer 1

I am assuming this is for a homework and so you want to use loops for this. When you say i in l1 each element i is an int and so it won't work to index it.

If you are trying to specifically print elements in indexes 4, 6, 9, 10 then you need to put these in a list and iterate over these. So for ex:

l1 =[1,56,67,79,90,47,08,56,79,84,76,79,68,]
to_print = [4, 6, 9, 10] # So if you want to print other/more index positions then modify this. Note that you may want to do a length check too before using these indexes as is.
for i in to_print:
    print(l1[i])

Answer 2

if you just want to loop over all items in the list by the indexes you could do something like this:

l1 =[1,56,67,79,90,47,8,56,79,84,76,79,68]
for i in range(len(l1)):
   if i in (4, 6, 9, 10):
      print(l1[i])

that being said, this is not the most efficient thing