{"id":71,"date":"2026-03-01T16:41:24","date_gmt":"2026-03-01T11:41:24","guid":{"rendered":"https:\/\/gigz.pk\/python\/?post_type=lesson&p=71"},"modified":"2026-03-13T11:00:05","modified_gmt":"2026-03-13T06:00:05","slug":"lists","status":"publish","type":"lesson","link":"https:\/\/gigz.pk\/python\/lesson\/lists\/","title":{"rendered":"Lists"},"content":{"rendered":"\n

A list<\/strong> is a collection data type in Python used to store multiple items in a single variable.
Lists are ordered<\/strong>, changeable (mutable)<\/strong>, and allow duplicate values<\/strong>.<\/p>\n\n\n\n

Lists are one of the most commonly used data structures in Python.<\/p>\n\n\n\n

CREATING A LIST<\/strong><\/h1>\n\n\n\n

Lists are created using square brackets [ ]<\/code>.<\/p>\n\n\n\n

numbers = [1, 2, 3, 4, 5]<\/pre>\n\n\n\n
Lists can store different data types:<\/p>\n\n\n\n
mixed = [10, \"Python\", 3.14, True]<\/pre>\n\n\n\n
ACCESSING LIST ELEMENTS<\/strong><\/h1>\n\n\n\n
List items are accessed using indexing.
Indexing starts from 0.<\/p>\n\n\n\n
fruits = [\"Apple\", \"Banana\", \"Mango\"]print(fruits[0])   # Apple
print(fruits[1])   # Banana<\/pre>\n\n\n\n
Negative indexing is also allowed:<\/p>\n\n\n\n
print(fruits[-1])  # Mango<\/pre>\n\n\n\n
SLICING A LIST<\/strong><\/h1>\n\n\n\n
Slicing allows you to get a range of elements.<\/p>\n\n\n\n
numbers = [1, 2, 3, 4, 5]print(numbers[1:4])   # [2, 3, 4]<\/pre>\n\n\n\n
MODIFYING LIST ELEMENTS<\/strong><\/h1>\n\n\n\n
Lists are mutable, meaning you can change their values.<\/p>\n\n\n\n
fruits = [\"Apple\", \"Banana\", \"Mango\"]
fruits[1] = \"Orange\"print(fruits)<\/pre>\n\n\n\n
ADDING ELEMENTS TO A LIST<\/strong><\/h1>\n\n\n\n
append() \u2013 Adds item at the end<\/h3>\n\n\n\n
numbers = [1, 2, 3]
numbers.append(4)<\/pre>\n\n\n\n
insert() \u2013 Adds item at specific position<\/h3>\n\n\n\n
numbers.insert(1, 10)<\/pre>\n\n\n\n
extend() \u2013 Adds multiple items<\/h3>\n\n\n\n
numbers.extend([5, 6])<\/pre>\n\n\n\n
REMOVING ELEMENTS FROM A LIST<\/strong><\/h1>\n\n\n\n
remove() \u2013 Removes specific value<\/h3>\n\n\n\n
numbers.remove(10)<\/pre>\n\n\n\n
pop() \u2013 Removes item by index<\/h3>\n\n\n\n
numbers.pop(0)<\/pre>\n\n\n\n
clear() \u2013 Removes all items<\/h3>\n\n\n\n
numbers.clear()<\/pre>\n\n\n\n
LOOPING THROUGH A LIST<\/strong><\/h1>\n\n\n\n
fruits = [\"Apple\", \"Banana\", \"Mango\"]for fruit in fruits:
    print(fruit)<\/pre>\n\n\n\n
COMMON LIST FUNCTIONS<\/strong><\/h1>\n\n\n\n
numbers = [5, 2, 8, 1]print(len(numbers))      # Length
print(max(numbers))      # Maximum value
print(min(numbers))      # Minimum valuenumbers.sort()           # Sort list
numbers.reverse()        # Reverse list<\/pre>\n\n\n\n
LIST COMPREHENSION<\/strong><\/h1>\n\n\n\n
A shorter way to create lists.<\/p>\n\n\n\n
squares = [x * x for x in range(5)]
print(squares)<\/pre>\n\n\n\n
IMPORTANT POINTS<\/strong><\/h1>\n\n\n\n
\u2022 Lists are ordered and indexed
\u2022 Lists are mutable (can be changed)
\u2022 Allow duplicate values
\u2022 Can store multiple data types<\/p>\n\n\n\n
WHY LISTS ARE IMPORTANT<\/strong><\/h1>\n\n\n\n
\u2022 Store multiple values efficiently
\u2022 Useful in data processing
\u2022 Essential for loops and functions
\u2022 Widely used in real-world Python applications<\/p>\n\n\n\n
Understanding lists<\/strong> is fundamental for working with data in Python.<\/p>\n\n\n
Home<\/a><\/span> \u00bb PYTHON INTERMEDIATE (PYI) > Data Structures > Lists<\/span><\/span><\/div>\n\n\n
<\/strong> 
<\/p> <\/div> <\/div>\n\n\n\n
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