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Introduction to Python
course content

Course Content

Introduction to Python

Introduction to Python

1. First Acquaintance
The Very First StepsCommentsSome Simple MathMore Challenging MathChallengeBringing It All Together
2. Variables and Types
Storing NumbersNaming RulesUsing VariablesData TypesNumbersChallengeStoring TextString IndexingNegative Indexing and LengthString SlicingChallengeConcatenation
3. Conditional Statements
Boolean Data TypeChallenge: Comparison OperatorsCombining ConditionsChallenge: Logical OperatorsMembership Operators and Types ComparisonSimple if/else ExpressionsChallenge: Grocery StoreChallenge: Odd and Evenif/elif/else ExpressionsChallenge: Grocery Store ExtendedChallenge: Positive, Negative or Zero
4. Other Data Types
What Is a List?List MethodsChallengeNested ListsChallengeWhat Is a Tuple?Tuple MethodsChallengeNested TuplesChallengeWhat Is a Dictionary?ChallengeDictionary MethodsChallenge
5. Loops
while LoopChallengefor LoopChallengeRangeChallengeIterating Over IndexesNested Loops
6. Functions
Built-in FunctionsChallengeDefining Your First FunctionChallengeif/else Statements in FunctionsChallengeFunctions With No ReturnChallengeModifying FunctionsChallengeLambda FunctionsChallenge

bookWhat Is a Tuple?

A tuple is another data type in Python that can hold multiple values or variables. These values are separated by commas and wrapped in parentheses. At first, it might seem like tuples are pretty similar to lists, but there are some key differences you should be aware of.

The main distinction lies in mutability: lists can be modified, but tuples cannot. You might recall altering a list using the .extend() method. This method isn't available for tuples, meaning once a tuple is set, you can't change its contents without creating a new tuple. Plus, tuples are more efficient in terms of speed and memory usage compared to lists. Given their immutability, tuples are often chosen when dealing with sensitive data.

Let's keep working with the example data we've been using:


              
123

            
# Create tuple
US_Info = ("USA", 9629091, 331002651)
print(type(US_Info))
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Note

You can also transform an iterable object into a tuple with the tuple() function.


              
123456

            
# Create a list 
list_variable = [1, 2, 3]
# Convert it into a tuple
tuple_variable = tuple(list_variable)
# Print the type of the converted variable
print(type(tuple_variable))
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Section 4. Chapter 6
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