Learn Python
- Python basic
- Introduction to File Handling
- Basics of List Comprehension
- Introduction to Matplotlib
- Classes and Objects
- Introduction to Functions
- Python Numbers
- Creating Basic Plots
- Opening and closing files
- Function parameters and arguments
- Advanced Techniques
- Attributes and Methods
- Python Strings
- Scope and lifetime of variables
- Advanced Plotting
- Reading from files
- Performance and Limitations
- Encapsulation
- Python List
- Specialized Plots
- Writing to files
- Return statement and output
- Inheritance
- Python Tuple
- Advanced Customization
- Working with different file formats
- Lambda Functions
- Polymorphism
- Practical Applications
- Higher-Order Functions
Python List
List operations
Let's focuses on manipulating elements within Python lists.
1. Adding elements:
1. Adding elements:
- append()
This method adds an element to the end of the list. It's like putting a new item at the back of your shopping list.
fruits = ["apple", "banana"]
fruits.append("cherry") # fruits becomes ["apple", "banana", "cherry"]- insert(index, element)
This method inserts an element at a specific position in the list. Think of inserting an item in the middle of your shopping list.
fruits = ["apple", "banana", "cherry"] fruits.insert(1, "kiwi") # fruits becomes ["apple", "kiwi", "banana", "cherry"]
2. Removing elements:
- remove(element)
This method removes the first occurrence of a specified element from the list.
fruits = ["apple", "banana", "cherry", "banana"]
fruits.remove("banana") # fruits becomes ["apple", "cherry", "banana"]- pop(index=-1)
This method removes and returns the element at a specific position in the list. By default (-1), it removes the last element. It's like taking something out of your shopping bag.
fruits = ["apple", "banana", "cherry"] removed_fruit = fruits.pop() # removed_fruit will be "cherry", fruits becomes ["apple", "banana"]
3. Modifying elements by assignment
Since lists are mutable (changeable), you can modify elements directly by their index within square brackets and assigning a new value.
fruits = ["apple", "banana", "cherry"] fruits[1] = "mango" # fruits becomes ["apple", "mango", "cherry"]
It's time to take a quiz!
Test your knowledge and see what you've just learned.
What does the append() method do in a Python list?
AAdds an element to the end of the list.
BRemoves an element from the list.
CInserts an element at a specific position.
DSorts the list.
Check Answer
How do you insert an element at a specific position in a Python list?
AUse the add() method.
BUse the insert(index, element) method.
CUse the append() method.
DUse the remove() method.
Check Answer
What does the remove() method do in a Python list?
ARemoves all occurrences of the specified element.
BRemoves the last element from the list.
CRemoves the first occurrence of the specified element.
DClears the entire list.
Check Answer
What does the pop() method do in a Python list?
ARemoves and returns the element at the specified index.
BRemoves and returns the last element by default.
CAdds an element to the end of the list.
DInserts an element at the specified index.
Check Answer
How can you modify an element in a Python list?
ABy assigning a new value to the specific index.
BBy using the change() method.
CBy using the modify() method.
DBy removing and re-adding the element.
Check Answer