Python programing basic knowledge hh.pdf

Python

1. Lists in Python
By NaimishDobariya

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.