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# Manipulating lists Challenge task 3 of 3

For some reason, it's saying that 'the_list' doesn't have the right items in it. At the end of the code, I put 'the_list.extend(range(4, 21))'

STAFF

This actually helped me find a place where I didn't test answers well enough. I've updated the code challenge so it should be more clear when this happens.

Thanks!

Sweet. Thanks for the response and speedy assistance!

STAFF

So long as `the_list` only has `[1, 2, 3]` in it by that point, what you have above should work. Can you show me what code you currently have?

Oh! Sorry. When I did "the_list.pop(1)", I should have put '3' because that was the position of the "1". I confused it with the 'remove' method. Lol! It's all clear now :)

the_list = ["a", 2, 3, 1, False, [1, 2, 3]]

the_list.pop(1) the_list.insert(0, 1)

the_list.remove("a") the_list.remove(False) the_list.remove([1, 2, 3])

the_list.extend(range(4, 21))

Did you run this in Workspaces or your local computer? There's a bug in how you're using `.pop()`. `.pop()` removes by index, not by value, so `the_list.pop(1)` gets back `2` (which is in the 1 index spot), so after your `the_list.insert(0, 1)`, your `the_list` looks like `[1, 'a', 3, 1, False, [1, 2, 3]]`.

Fix that bug and the rest of your code should work fine.

Stephen:

```the_list.extend(range(4,21)
```

worked for me. I would advise to check your .pop() code and try again.