{"id":62,"date":"2025-10-21T04:23:36","date_gmt":"2025-10-21T04:23:36","guid":{"rendered":"https:\/\/codetypingpro.com\/?p=62"},"modified":"2025-12-17T07:50:31","modified_gmt":"2025-12-17T07:50:31","slug":"lesson-9-lists-tuples-and-sets","status":"publish","type":"post","link":"https:\/\/codetypingpro.com\/?p=62","title":{"rendered":"Lesson 9: Lists, Tuples, and Sets"},"content":{"rendered":"\n

\ud83c\udfaf Lesson Objective<\/strong><\/h3>\n\n\n\n

To understand how to work with Python\u2019s most common collection data types \u2014 Lists<\/strong>, Tuples<\/strong>, and Sets<\/strong>, and how to manipulate and use them effectively.<\/p>\n\n\n\n

\n\n\n\n

\ud83e\udde9 1. Lists<\/strong><\/h2>\n\n\n\n

A list<\/strong> is a mutable<\/strong> (changeable) collection of items, written with square brackets [ ]<\/strong>.<\/p>\n\n\n\n

\u2705 Example:<\/strong><\/p>\n\n\n\n

fruits = [\"apple\", \"banana\", \"cherry\"]\nprint(fruits)\n<\/code><\/pre>\n\n\n\n
Output:<\/strong><\/p>\n\n\n\n
['apple', 'banana', 'cherry']\n<\/code><\/pre>\n\n\n\n
\n\n\n\n
\u2699\ufe0f List Operations<\/strong><\/h3>\n\n\n\n
Operation<\/th>Example<\/th>Output<\/th><\/tr><\/thead>
Access element<\/td>fruits[0]<\/code><\/td>apple<\/code><\/td><\/tr>
Negative index<\/td>fruits[-1]<\/code><\/td>cherry<\/code><\/td><\/tr>
Slice<\/td>fruits[0:2]<\/code><\/td>['apple', 'banana']<\/code><\/td><\/tr>
Length<\/td>len(fruits)<\/code><\/td>3<\/code><\/td><\/tr>
Add item<\/td>fruits.append('orange')<\/code><\/td>['apple', 'banana', 'cherry', 'orange']<\/code><\/td><\/tr>
Insert item<\/td>fruits.insert(1, 'mango')<\/code><\/td>['apple', 'mango', 'banana', 'cherry']<\/code><\/td><\/tr>
Remove item<\/td>fruits.remove('banana')<\/code><\/td>['apple', 'cherry']<\/code><\/td><\/tr>
Pop item<\/td>fruits.pop()<\/code><\/td>removes last element<\/td><\/tr>
Reverse<\/td>fruits.reverse()<\/code><\/td>reversed list<\/td><\/tr>
Sort<\/td>fruits.sort()<\/code><\/td>alphabetically sorted<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
\n\n\n\n
\ud83d\udd01 Looping Through a List<\/strong><\/h3>\n\n\n\n
numbers = [10, 20, 30, 40]\nfor num in numbers:\n    print(num)\n<\/code><\/pre>\n\n\n\n
Output:<\/strong><\/p>\n\n\n\n
10\n20\n30\n40\n<\/code><\/pre>\n\n\n\n
\n\n\n\n
\ud83e\uddee List Comprehension<\/strong><\/h3>\n\n\n\n
A short way to create lists.<\/p>\n\n\n\n
squares = [x**2 for x in range(5)]\nprint(squares)\n<\/code><\/pre>\n\n\n\n
Output:<\/strong><\/p>\n\n\n\n
[0, 1, 4, 9, 16]\n<\/code><\/pre>\n\n\n\n
\n\n\n\n
\ud83e\uddf1 2. Tuples<\/strong><\/h2>\n\n\n\n
A tuple<\/strong> is an immutable<\/strong> (unchangeable) sequence, written with parentheses ( )<\/strong>.<\/p>\n\n\n\n
\u2705 Example:<\/strong><\/p>\n\n\n\n
colors = (\"red\", \"green\", \"blue\")\nprint(colors)\n<\/code><\/pre>\n\n\n\n
Output:<\/strong><\/p>\n\n\n\n
('red', 'green', 'blue')\n<\/code><\/pre>\n\n\n\n
\n\n\n\n
\u2699\ufe0f Tuple Operations<\/strong><\/h3>\n\n\n\n
Operation<\/th>Example<\/th>Output<\/th><\/tr><\/thead>
Access<\/td>colors[1]<\/code><\/td>green<\/code><\/td><\/tr>
Length<\/td>len(colors)<\/code><\/td>3<\/code><\/td><\/tr>
Count<\/td>colors.count('red')<\/code><\/td>1<\/code><\/td><\/tr>
Index<\/td>colors.index('blue')<\/code><\/td>2<\/code><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Note:<\/strong> You cannot modify a tuple (no append\/remove\/sort).<\/p>\n\n\n\n
\n\n\n\n
\ud83d\udd01 Looping Through a Tuple<\/strong><\/h3>\n\n\n\n
for color in colors:\n    print(color)\n<\/code><\/pre>\n\n\n\n
Output:<\/strong><\/p>\n\n\n\n
red\ngreen\nblue\n<\/code><\/pre>\n\n\n\n
\n\n\n\n
\ud83d\udd04 Tuple Unpacking<\/strong><\/h3>\n\n\n\n
person = (\"Sameer\", 25, \"Warangal\")\nname, age, city = person\nprint(name)\nprint(age)\nprint(city)\n<\/code><\/pre>\n\n\n\n
Output:<\/strong><\/p>\n\n\n\n
Sameer\n25\nWarangal\n<\/code><\/pre>\n\n\n\n
\n\n\n\n
\ud83d\udd37 3. Sets<\/strong><\/h2>\n\n\n\n
A set<\/strong> is an unordered<\/strong>, unique collection<\/strong> written with curly braces { }<\/strong>.<\/p>\n\n\n\n
\u2705 Example:<\/strong><\/p>\n\n\n\n
fruits = {\"apple\", \"banana\", \"cherry\", \"apple\"}\nprint(fruits)\n<\/code><\/pre>\n\n\n\n
Output:<\/strong><\/p>\n\n\n\n
{'apple', 'banana', 'cherry'}   # Duplicates removed\n<\/code><\/pre>\n\n\n\n
\n\n\n\n
\u2699\ufe0f Set Operations<\/strong><\/h3>\n\n\n\n
Operation<\/th>Example<\/th>Output<\/th><\/tr><\/thead>
Add item<\/td>fruits.add('orange')<\/code><\/td>adds one item<\/td><\/tr>
Update<\/td>fruits.update(['mango','grape'])<\/code><\/td>adds multiple items<\/td><\/tr>
Remove<\/td>fruits.remove('banana')<\/code><\/td>removes banana<\/td><\/tr>
Discard<\/td>fruits.discard('kiwi')<\/code><\/td>no error if missing<\/td><\/tr>
Clear<\/td>fruits.clear()<\/code><\/td>empty set<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
\n\n\n\n
\ud83d\udd22 Set Mathematical Operations<\/strong><\/h3>\n\n\n\n
Sets are useful for union<\/strong>, intersection<\/strong>, and difference<\/strong>.<\/p>\n\n\n\n
a = {1, 2, 3, 4}\nb = {3, 4, 5, 6}\n\nprint(a.union(b))         # {1, 2, 3, 4, 5, 6}\nprint(a.intersection(b))  # {3, 4}\nprint(a.difference(b))    # {1, 2}\n<\/code><\/pre>\n\n\n\n
\n\n\n\n
\ud83d\udd01 Looping Through a Set<\/strong><\/h3>\n\n\n\n
for item in {\"cat\", \"dog\", \"bird\"}:\n    print(item)\n<\/code><\/pre>\n\n\n\n
\n\n\n\n
\ud83e\udde0 4. Key Differences<\/strong><\/h2>\n\n\n\n
Feature<\/th>List<\/th>Tuple<\/th>Set<\/th><\/tr><\/thead>
Syntax<\/td>[ ]<\/code><\/td>( )<\/code><\/td>{ }<\/code><\/td><\/tr>
Mutable<\/td>\u2705 Yes<\/td>\u274c No<\/td>\u2705 Yes<\/td><\/tr>
Ordered<\/td>\u2705 Yes<\/td>\u2705 Yes<\/td>\u274c No<\/td><\/tr>
Allows Duplicates<\/td>\u2705 Yes<\/td>\u2705 Yes<\/td>\u274c No<\/td><\/tr>
Indexed<\/td>\u2705 Yes<\/td>\u2705 Yes<\/td>\u274c No<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
\n\n\n\n
\ud83c\udf0d 5. Real-Life Example \u2013 Student Grades<\/strong><\/h2>\n\n\n\n
students = [\"Ali\", \"Sara\", \"John\"]\ngrades = (85, 90, 78)\nsubjects = {\"Math\", \"Science\", \"English\"}\n\nprint(\"Students:\", students)\nprint(\"Grades:\", grades)\nprint(\"Subjects:\", subjects)\n<\/code><\/pre>\n\n\n\n
Output:<\/strong><\/p>\n\n\n\n
Students: ['Ali', 'Sara', 'John']\nGrades: (85, 90, 78)\nSubjects: {'Math', 'Science', 'English'}\n<\/code><\/pre>\n\n\n\n
\n\n\n\n
<\/p>\n","protected":false},"excerpt":{"rendered":"
\ud83c\udfaf Lesson Objective To understand how to work with Python\u2019s most common collection data types \u2014 Lists, Tuples, and Sets, and how to manipulate and use them effectively. \ud83e\udde9 1. Lists A list is a mutable (changeable) collection of items, written with square brackets [ ]. \u2705 Example: Output: \u2699\ufe0f List Operations Operation Example Output […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6,1],"tags":[],"class_list":["post-62","post","type-post","status-publish","format-standard","hentry","category-python-easy-course-outline","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/codetypingpro.com\/index.php?rest_route=\/wp\/v2\/posts\/62","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/codetypingpro.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/codetypingpro.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/codetypingpro.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/codetypingpro.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=62"}],"version-history":[{"count":1,"href":"https:\/\/codetypingpro.com\/index.php?rest_route=\/wp\/v2\/posts\/62\/revisions"}],"predecessor-version":[{"id":63,"href":"https:\/\/codetypingpro.com\/index.php?rest_route=\/wp\/v2\/posts\/62\/revisions\/63"}],"wp:attachment":[{"href":"https:\/\/codetypingpro.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=62"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/codetypingpro.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=62"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/codetypingpro.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=62"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}