This document provides an introduction to object-oriented programming and describes how to create a Python module with a class. It defines object-oriented programming as an approach to organize code where an object contains both data and behavior. Classes help create reusable code through concepts like encapsulation, inheritance, and polymorphism. The document then outlines the six steps to create an example class, including minimal definition, initializing attributes, adding initialization parameters, error checking, string representation, and methods. It encourages the reader to create their own Python module and class.

1. OBJECT-ORIENTED PROGRAMMING
GIUSEPPE MASETTI
ESCI 872 – APPLIED TOOLS FOR OCEAN MAPPING – INTRODUCTION TO OCEAN DATA SCIENCE
Durham, NH – August 29, 2019
V1

3. Definition
Instantiation
External
Access

4. MODULE
GOAL:
Add more
methods
to classes

5. WHY OBJECT-ORIENTED PROGRAMMING?
• Powerful approach to organize your code
• An object contains both:
• Data → Class variables
• Behavior → Methods (Class functions)
• Helps on creating reusable code → Don’t Repeat Yourself (DRY)
• An object keeps internal a lot of details → Encapsulation
• Many other good reasons
• AbstracƟon → Helps building complex systems by spliƫng their complexity
• Inheritance → A class may inherit data/behavior from other classes + extend them
• Polymorphism → The same method may behave differently on different classes
• …

6. CLASS VS OBJECT

7. MODULE TASK → AN EXAMPLE CLASS IN SIX STEPS
1. MINIMAL DEFINITION

8. MODULE TASK → AN EXAMPLE CLASS IN SIX STEPS
1. MINIMAL DEFINITION
2.+ __init__()

9. MODULE TASK → AN EXAMPLE CLASS IN SIX STEPS
1. MINIMAL DEFINITION
2.+ __init__()
3.+ INITIALIZATION PARAMETER

10. MODULE TASK → AN EXAMPLE CLASS IN SIX STEPS
1. MINIMAL DEFINITION
2.+ __init__()
3.+ INITIALIZATION PARAMETER
4.+ ERROR CHECK

11. MODULE TASK → AN EXAMPLE CLASS IN SIX STEPS
1. MINIMAL DEFINITION
2.+ __init__()
3.+ INITIALIZATION PARAMETER
4.+ ERROR CHECK
5.+ __str__()

12. MODULE TASK → AN EXAMPLE CLASS IN SIX STEPS
1. MINIMAL DEFINITION
2.+ __init__()
3.+ INITIALIZATION PARAMETER
4.+ ERROR CHECK
5.+ __str__()
6.+ read()

13. A DIFFERENT CODING APPROACH
PROGRAMMING BASIC
WITH PYTHON
INTRODUCTION TO
OCEAN DATA SCIENCE
Definition
Instantiation
Instantiation
Definition ???

14. YOU WILL CREATE YOUR OWN PYTHON MODULE!

15. YOU WILL CREATE YOUR OWN PYTHON MODULE!
mycode

16. YOU WILL CREATE YOUR OWN PYTHON MODULE!
mycode

17. YOU WILL CREATE YOUR OWN PYTHON MODULE!
mycode

18. GO TO “FIRST STEPS OF A CLASS” NOTEBOOK

19. QUESTIONS?
Contact me at: gmasetti@ccom.unh.edu