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CS105: Introduction to Python

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Unit 2 Study Session Video Review

Course Introduction

Course Syllabus

Unit 1: Introduction to Python 3

1.1: Introduction to Python 3

Introducing Python

1.2: Accessing the Repl.it IDE

The Repl.it IDE

1.3: Python 3 Data Types: int and float

Compare and Contrast int vs. float

Scientific Notation for Floating Point Numbers

1.4: Variable Assignment

Variables and Assignment Statements

Reserved Words and Variable Naming Conventions

1.5: Basic Python Output Using the print Function

Using Variables in Python

1.6: More Python 3 Data Types: str

The Basics of Strings

Values, Types, Variable Names, and Keywords

Unit 1 Study Session Video Review

Unit 1 Study Session Video Review

Unit 1 Review and Assessment

Unit 1 Review

Unit 1 Assessment

Unit 2: Operators

2.1: Arithmetic Operators: +, -, *, /, **, %, and //

Practice With Arithmetic Operators

2.2: Operator Precedence and Using Parentheses

PEMDAS

Practice With Operator Precedence

2.3: Relational and Logical Operators

The bool Data Type

Practice with Relational and Logical Operators

2.4: Operator Precedence Revisited

Operators and Expressions

Study Session Video Review

Unit 2 Study Session Video Review

Unit 2 Review and Assessment

Unit 2 Review

Unit 2 Assessment

Unit 3: Input and Flow Control Statements

3.1: Reading Data from the Keyboard

The Input Command

3.2: Using Conditional Statements

if, else, and elif Statements

3.3: Loop and Iterations

Using "while" Loops

Using "for" Loops

"break", "continue", and "pass" Statements

3.4: Further Study

More Useful Videos

Study Session Video Review

Unit 3 Study Session Video Review

Unit 3 Review and Assessment

Unit 3 Review

Unit 3 Assessment

Unit 4: Data Structures I – Lists and Strings

4.1: Python Lists

Creating Lists

Indexing

Slicing

List Methods

List Comprehension

4.2: Strings Revisited

Going Deeper with Strings

String Methods

4.3: Data Visualization Application

The matplotlib Library

Study Session Video Review

Unit 4 Study Session Video Review

Unit 4 Review and Assessment

Unit 4 Review

Unit 4 Assessment

Unit 5: Functions

5.1: The Basics of Functions

Creating Functions

5.2: Some Useful Modules

Trigonometry Review

Random Numbers

The "math" Module

5.3: Application

Cryptographic Application

Study Session Video Review

Unit 5 Study Session Video Review

Unit 5 Review and Assessment

Unit 5 Review

Unit 5 Assessment

Unit 6: Basic Data Structures II – Tuples, Sets and Dictionaries

6.1: Immutable Collections

Tuples and Sets

6.2: Mutable Collections

Dictionaries

Dictionaries and Loops

Dictionaries and Tuples

6.3: A Comprehensive Review of Data Structures

Getting Started with Data

Study Session Video Review

Unit 6 Study Session Video Review

Unit 6 Review and Assessment

Unit 6 Review

Unit 6 Assessment

Unit 7: File Handling

7.1: File Input and Output

Syntax and Usage

7.2: Visualizing Data from a File

Data Visualization from a Data File

Study Session Video Review

Unit 7 Study Session Video Review

Unit 7 Review and Assessment

Unit 7 Review

Unit 7 Assessment

Unit 8: Regular Expressions

8.1: The "re" Module

Syntax and Usage

Delving Deeper

8.2: Processing File Data

Processing File Data

Study Session Video Review

Unit 8 Study Session Video Review

Unit 8 Review and Assessment

Unit 8 Review

Unit 8 Assessment

Unit 9: Exception Handling

9.1: Catching and Handling Errors

Stuff Happens

Example: Try and Except

Example: ZeroDivisionError

Example: Else and Finally

Exceptions Lesson

More Examples

9.2: Handling a File Error

Handling a File Error

Study Session Video Review

Unit 9 Study Session Video Review

Unit 9 Review and Assessment

Unit 9 Review

Unit 9 Assessment

Unit 10: Object-Oriented Programming

10.1: Overview of Object-Oriented Programming

Structured Programming and Procedural Programming

Procedural Programming versus Object-Oriented Programming

10.2: Object-Oriented Programming (OOP)

Basic Terminology

Creating Classes and Methods

Magic Methods

Going Deeper

10.3: Derived Classes

Inheritance

Going Deeper

10.4: Applying Object-Oriented Programming

An Example of OOP and Inheritance

Study Session Video Review

Unit 10 Study Session Video Review

Unit 10 Review and Assessment

Unit 10 Review

Unit 10 Assessment

Course Summary and Review

Course Summary and Review

Study Guide

CS105 Study Guide

Course Feedback Survey

Course Feedback Survey

Certificate Final Exam

CS105: Certificate Final Exam

Saylor Direct Credit Final Exam
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CS105: Introduction to Python
Unit 2: Operators
Study Session Video Review
Unit 2 Study Session Video Review

Unit 2 Study Session Video Review

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Saylor Academy © 2010-2025 except as otherwise noted. Excluding course final exams, content authored by Saylor Academy is available under a Creative Commons Attribution 3.0 Unported license. Third-party materials are the copyright of their respective owners and shared under various licenses. See detailed licensing information. Saylor Academy®, Saylor.org®, and Harnessing Technology to Make Education Free® are trade names of the Constitution Foundation, a 501(c)(3) organization through which our educational activities are conducted.