This document provides an introduction to lists in Python. It explains that lists allow for ordered collections of items represented by comma separated values. Items in a list can be strings, numbers, or other data types. Each item in a list has an index starting from 0. Indexes provide the position of each item in the list. Lists can also contain other lists. Exercises are provided to access specific items in lists using indexes.

1. AI Club

2. AI Club
Python with AI –
Introduction to Lists

3. Lists in Python
• A list holds ordered collection of items.
• This is represented by comma separated values
• Print items in a list

4. Lists in Python
• A list holds ordered collection of items.
• This is represented by comma separated values
• An item can be a string or a number or anything else 

5. Lists in Python
• An item can be a string or a number or anything else 
• Think about how you would specify a shopping list if there was no
concept of lists in python?

6. Lists in Python
• An item can be a string or a number or anything else 
• Think about how you would specify a shopping list if there was no
concept of lists in python?
• You might have to specify one variable for each item and then use
something else to tie all these variables together

7. Concept of index in a List
• An item can be a string or a number or anything else 
• Each item in the list has a index
• Index in python starts with 0
0 3
2
1 4
Index =

8. Concept of index in a List
• An item can be a string or a number or anything else 
• Each item in the list has a index
• Index in python starts with 0
• How is this index useful?
0 3
2
1 4
Index =

9. Concept of index in a List
• An item can be a string or a number or anything else 
• How is this index useful?
• Index tells you the position of the item. Example – 0th item in the list
shoplist is ‘apple’, 1st items is 50 etc
0 3
2
1 4
Index =

10. Lists inside lists
• An item inside a list can be another list

11. Access an item in a list
• An item inside a list can be another list
• How can you access the item mouse?

12. Exercise
• An item inside a list can be another list
• How can you access and print the item mouse
• Use the index to access the item

13. Exercise
• An item inside a list can be another list
• How can you access and print the item mouse
• How can you access and print the item [‘a’] ?

14. Exercise
• An item inside a list can be another list
• How can you access and print the item mouse
• How can you access and print the item [‘a’] ?
• How can you access and print a?

15. Exercise
• An item inside a list can be another list
• How can you access and print the item mouse
• How can you access and print the item [‘a’] ?
• How can you access and print a?

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