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Python Data Structures

List IndexingList Indexing

In Python, lists allow for element indexing. This means we can access each item in the list by its index. Remember, indexing in lists starts at 0. So, the first item is at index 0, the second at index 1, and so forth.

We've covered positive indexing, but there's also something called negative indexing. Negative indexing starts from the end of the list. For instance, index -1 refers to the last item, index -2 points to the second-to-last item, and so on.

Let's put this into practice.

Tarea

You're given: list_1 = ['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h']. Your task is to extract the first, third, fifth, and seventh items from this list and create a new list with these items, using positive indices only.

¿Todo estuvo claro?

Sección 1. Capítulo 4
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course content

Contenido del Curso

Python Data Structures

1. List

Creating a ListNested ListChallenge: Create a ListList IndexingList LengthLists Are MutableAppend() MethodInsert() MethodDeleting ElementsRemoving ElementsList Comprehensions

2. Dictionary

Creating a DictionaryChallenge: Craft the DictionaryExtraction of InformationAdding ItemsDel KeywordPop() MethodPopitem() MethodClear() MethodDictionary Comprehensions

3. Tuple

Creating a Tuple Accessing Elements of a TupleConcatenation of Tuples Delete a Tuple Update a TupleAdding Items Challenge: Concatenate Tuples

4. Set

Creating a SetAdd() MethodUpdate() MethodAccessing the Elements of a SetRemove() and Discard() MethodsClear() Method

Python Data Structures

List IndexingList Indexing

In Python, lists allow for element indexing. This means we can access each item in the list by its index. Remember, indexing in lists starts at 0. So, the first item is at index 0, the second at index 1, and so forth.

We've covered positive indexing, but there's also something called negative indexing. Negative indexing starts from the end of the list. For instance, index -1 refers to the last item, index -2 points to the second-to-last item, and so on.

Let's put this into practice.

Tarea

You're given: list_1 = ['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h']. Your task is to extract the first, third, fifth, and seventh items from this list and create a new list with these items, using positive indices only.

¿Todo estuvo claro?

Sección 1. Capítulo 4
toggle bottom row
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