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Python Data Structures

Deleting Elements

Imagine you have a to-do list:

This list contains 3 items.

Let's say you've finished the first task on this list; meaning, you've already sent an email to Tom. To cross that task off the list, you'd write:

Now, the list is down to two tasks:

  • tasks[0] reads 'call Max';
  • tasks[1] reads 'meet with sister'.

You can remove any item from the list by using its index number.

Note

Curious about the syntax of del?

  • The statement starts with the keyword del;
  • Next, you typically identify the list item with its index like tasks[index].

Time to give it a shot!

Task

Here's your list:

groups = ['The Beatles', 'The Band', 'The Clash', 'The Dillards', 'The Mamas and the Papas', 'The Kingston Trio']

Your task is to remove the following bands from the list using positive indexing only: 'The Beatles' and 'The Mamas and the Papas'.

Stuck on which indexes to use for removal? Check out the hints.

Everything was clear?

Section 1. Chapter 9
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course content

Course Content

Python Data Structures

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

Deleting Elements

Imagine you have a to-do list:

This list contains 3 items.

Let's say you've finished the first task on this list; meaning, you've already sent an email to Tom. To cross that task off the list, you'd write:

Now, the list is down to two tasks:

  • tasks[0] reads 'call Max';
  • tasks[1] reads 'meet with sister'.

You can remove any item from the list by using its index number.

Note

Curious about the syntax of del?

  • The statement starts with the keyword del;
  • Next, you typically identify the list item with its index like tasks[index].

Time to give it a shot!

Task

Here's your list:

groups = ['The Beatles', 'The Band', 'The Clash', 'The Dillards', 'The Mamas and the Papas', 'The Kingston Trio']

Your task is to remove the following bands from the list using positive indexing only: 'The Beatles' and 'The Mamas and the Papas'.

Stuck on which indexes to use for removal? Check out the hints.

Everything was clear?

Section 1. Chapter 9
toggle bottom row
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