![Creating Lists
• • Lists are defined using square brackets []
• • Example: my_list = [1, 2, 3, 'Python', True]](https://image.slidesharecdn.com/pythonlistspresentation-250307032338-0c0fad85/85/Python-programing-basic-knowledge-hh-pdf-3-320.jpg)
![Accessing Elements
• • Use indexing to access elements (zero-based
indexing)
• • Example: my_list[0] gives first element
• • Negative indexing: my_list[-1] gives last
element](https://image.slidesharecdn.com/pythonlistspresentation-250307032338-0c0fad85/85/Python-programing-basic-knowledge-hh-pdf-4-320.jpg)
![Modifying Lists
• • Lists are mutable, meaning elements can be
changed.
• • Example: my_list[1] = 'New Value'](https://image.slidesharecdn.com/pythonlistspresentation-250307032338-0c0fad85/85/Python-programing-basic-knowledge-hh-pdf-5-320.jpg)
![List Comprehensions
• • A concise way to create lists
• • Example: squares = [x**2 for x in range(10)]](https://image.slidesharecdn.com/pythonlistspresentation-250307032338-0c0fad85/85/Python-programing-basic-knowledge-hh-pdf-8-320.jpg)
Python programing basic knowledge hh.pdf
- 1. Lists in Python By Naimish Dobariya
- 2. Introduction to Lists • • A list is a collection of items in a particular order. • • Lists are mutable (can be changed). • • Lists can contain different data types.
- 3. Creating Lists • • Lists are defined using square brackets [] • • Example: my_list = [1, 2, 3, 'Python', True]
- 4. Accessing Elements • • Use indexing to access elements (zero-based indexing) • • Example: my_list[0] gives first element • • Negative indexing: my_list[-1] gives last element
- 5. Modifying Lists • • Lists are mutable, meaning elements can be changed. • • Example: my_list[1] = 'New Value'
- 6. Common List Methods • • append(): Adds an item to the end • • insert(): Inserts an item at a specified index • • remove(): Removes a specific item • • pop(): Removes and returns the last or specified item • • sort(): Sorts the list
- 7. Looping Through Lists • • Use a for loop to iterate through a list • • Example: • for item in my_list: • print(item)
- 8. List Comprehensions • • A concise way to create lists • • Example: squares = [x**2 for x in range(10)]
- 9. List Operations • • Concatenation: list1 + list2 • • Repetition: list * 3 • • Membership: 'item' in list
- 10. Examples & Exercises • • Create a list of your favorite fruits. • • Access the second item in the list. • • Append a new item and print the list. • • Remove an item from the list.