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Introduction to Python
course content

Course Content

Introduction to Python

Introduction to Python

1. First Acquaintance with Python
The Very First Steps in PythonHow to Use Comments for ReadabilityPerform Simple Math in PythonHandle More Complex Math in PythonBringing Python Fundamentals Together
2. Variables and Types in Python
How to Store Numbers in PythonPython Naming Rules for VariablesHow to Work with Variables in PythonData Types in PythonChallenge: Converting Kilometers to MilesStore Text with Strings in PythonString Indexing in PythonNegative Indexing and String Length in PythonString Slicing in PythonChallenge: Retrieving Letters from StringString Concatenation in Python
3. Conditional Statements in Python
Boolean Data Type in PythonChallenge: Working with Comparison OperatorsHow to Combine Conditions in PythonChallenge: Working with Logical OperatorsMembership Operators and Type Comparisons in PythonHow to Use if/else Expressions in PythonChallenge: Running a Grocery StoreChallenge: Creating Odd and Even Logicif/elif/else ExpressionsChallenge: Running Grocery Store ExtendedChallenge: Weather Adviser
4. Other Data Types in Python
Python ListsCommon List Methods in PythonChallenge: Updating ListNested Lists in PythonChallenge: Retrieving Information from Nested ListPython TuplesCommon Tuple Methods in PythonChallenge: Updating TupleNested Tuples in PythonChallenge: Retrieving Information from Nested TuplePython DictionariesChallenge: Creating DictionaryCommon Dictionary Methods in PythonChallenge: Updating Dictionary
5. Loops in Python
Explore the while Loop in PythonChallenge: Working with the While LoopExplore the for Loop in PythonChallenge: Working with the For LoopRange Function in PythonChallenge: Using the Range FunctionHow to Iterate Over Indexes in PythonExplore Nested Loops in Python
6. Functions in Python
Built-in Functions in PythonChallenge: Converting HeightsHow to Create Functions in PythonChallenge: Writing First FunctionUse of if/else Statements in Python FunctionsChallenge: Identifying Positive Values Functions Without Return in PythonChallenge: Creating Logging FunctionModifying Functions in PythonChallenge: Updating Logic of the FunctionLambda Functions in PythonChallenge: Creating Lambda Function

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Python Lists

A list is a data type that can store multiple items of various types, such as numbers, strings, and tuples.

To create a list, place comma-separated values inside square brackets [] or convert an iterable a string, set, or tuple using list(). You can create a list with details about the USA (country name, land area, and population):


              
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# Create list
US_Info = ["USA", 9629091, 331002651]

# Printing list
print(US_Info)
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Accessing list elements is similar to accessing characters in a stringβ€”using indexing and slicing.

To retrieve the land area and population from US_Info, target the second (index 1) and third (index 2) items. Use slicing with a colon : to specify the start and end positions.

Note

The upper limit of a slice is excluded, so use [1:3] to retrieve these two elements.


              
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# Getting area and population
US_Info = ["USA", 9629091, 331002651]

# Printing list
print(US_Info[1:3])
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SectionΒ 4. ChapterΒ 1
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