List
| Package/Method | Description | Code Example |
|---|---|---|
| append() | The `append()` method is used to add an element to the end of a list. | Syntax:1list_name.append(element) Copied!Example:12fruits = ["apple", "banana", "orange"] fruits.append("mango") print(fruits)Copied! |
| copy() | The `copy()` method is used to create a shallow copy of a list. | Example 1:123my_list = [1, 2, 3, 4, 5] new_list = my_list.copy() print(new_list) # Output: [1, 2, 3, 4, 5]Copied! |
| count() | The `count()` method is used to count the number of occurrences of a specific element in a list in Python. | Example:123my_list = [1, 2, 2, 3, 4, 2, 5, 2] count = my_list.count(2) print(count) # Output: 4Copied! |
| Creating a list | A list is a built-in data type that represents an ordered and mutable collection of elements. Lists are enclosed in square brackets [] and elements are separated by commas. | Example:1fruits = ["apple", "banana", "orange", "mango"]Copied! |
| del | The `del` statement is used to remove an element from list. `del` statement removes the element at the specified index. | Example:123my_list = [10, 20, 30, 40, 50] del my_list[2] # Removes the element at index 2 print(my_list) # Output: [10, 20, 40, 50]Copied! |
| extend() | The `extend()` method is used to add multiple elements to a list. It takes an iterable (such as another list, tuple, or string) and appends each element of the iterable to the original list. | Syntax:1list_name.extend(iterable) Copied!Example:1234fruits = ["apple", "banana", "orange"] more_fruits = ["mango", "grape"] fruits.extend(more_fruits) print(fruits)Copied! |
| Indexing | Indexing in a list allows you to access individual elements by their position. In Python, indexing starts from 0 for the first element and goes up to `length_of_list – 1`. | Example:12345my_list = [10, 20, 30, 40, 50] print(my_list[0]) # Output: 10 (accessing the first element) print(my_list[-1]) # Output: 50 (accessing the last element using negative indexing)Copied! |
| insert() | The `insert()` method is used to insert an element. | Syntax:1list_name.insert(index, element) Copied!Example:123my_list = [1, 2, 3, 4, 5] my_list.insert(2, 6) print(my_list)Copied! |
| Modifying a list | You can use indexing to modify or assign new values to specific elements in the list. | Example:1234my_list = [10, 20, 30, 40, 50] my_list[1] = 25 # Modifying the second element print(my_list) # Output: [10, 25, 30, 40, 50]Copied! |
| pop() | `pop()` method is another way to remove an element from a list in Python. It removes and returns the element at the specified index. If you don’t provide an index to the `pop()` method, it will remove and return the last element of the list by default | Example 1:1234567my_list = [10, 20, 30, 40, 50] removed_element = my_list.pop(2) # Removes and returns the element at index 2 print(removed_element) # Output: 30 print(my_list) # Output: [10, 20, 40, 50] Copied!Example 2:1234567my_list = [10, 20, 30, 40, 50] removed_element = my_list.pop() # Removes and returns the last element print(removed_element) # Output: 50 print(my_list) # Output: [10, 20, 30, 40]Copied! |
| remove() | To remove an element from a list. The `remove()` method removes the first occurrence of the specified value. | Example:1234my_list = [10, 20, 30, 40, 50] my_list.remove(30) # Removes the element 30 print(my_list) # Output: [10, 20, 40, 50]Copied! |
| reverse() | The `reverse()` method is used to reverse the order of elements in a list | Example 1:123my_list = [1, 2, 3, 4, 5] my_list.reverse() print(my_list) # Output: [5, 4, 3, 2, 1]Copied! |
| Slicing | You can use slicing to access a range of elements from a list. | Syntax:1list_name[start:end:step] Copied!Example:123456789101112my_list = [1, 2, 3, 4, 5] print(my_list[1:4]) # Output: [2, 3, 4] (elements from index 1 to 3)print(my_list[:3]) # Output: [1, 2, 3] (elements from the beginning up to index 2) print(my_list[2:]) # Output: [3, 4, 5] (elements from index 2 to the end) print(my_list[::2]) # Output: [1, 3, 5] (every second element)Copied! |
| sort() | The `sort()` method is used to sort the elements of a list in ascending order. If you want to sort the list in descending order, you can pass the `reverse=True` argument to the `sort()` method. | Example 1:1234my_list = [5, 2, 8, 1, 9] my_list.sort() print(my_list) # Output: [1, 2, 5, 8, 9] Copied!Example 2:1234my_list = [5, 2, 8, 1, 9] my_list.sort(reverse=True) print(my_list) # Output: [9, 8, 5, 2, 1]Copied! |
Tuple
| Package/Method | Description | Code Example |
|---|---|---|
| count() | The count() method for a tuple is used to count how many times a specified element appears in the tuple. | Syntax:1tuple.count(value)Copied!Example:123fruits = ("apple", "banana", "apple", "orange")print(fruits.count("apple")) #Counts the number of times apple is found in tuple.#Output: 2Copied! |
| index() | The index() method in a tuple is used to find the first occurrence of a specified value and returns its position (index). If the value is not found, it raises a ValueError. | Syntax:1tuple.index(value) Copied!Example:123fruits = ("apple", "banana", "orange")print(fruits[1]) #Returns the value at which apple is present.#Output: bananaCopied! |
| sum() | The sum() function in Python can be used to calculate the sum of all elements in a tuple, provided that the elements are numeric (integers or floats). | Syntax:1sum(tuple) Copied!Example:123numbers = (10, 20, 5, 30)print(sum(numbers))#Output: 65Copied! |
| min() and max() | Find the smallest (min()) or largest (max()) element in a tuple. | Example:12345numbers = (10, 20, 5, 30)print(min(numbers)) #Output: 5print(max(numbers))#Output: 30Copied! |
| len() | Get the number of elements in the tuple using len(). | Syntax:1len(tuple)Copied!Example:123fruits = ("apple", "banana", "orange")print(len(fruits)) #Returns length of the tuple.#Output: 3 |