[Script Info]
Title: 
[Events]
Format: Layer, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,So, it's
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,Monty Python Flying Circus
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,okay actually it is not but just so you know
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,this is where the python language got its name
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,it is from the comedy\Nbut today's talk will be about OOP or object-orientated programming in python
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,And I am Junxi, I am a second-year student from Singapore University of Technology and Design
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,currently in the Computer Science / info systems major
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,And I am also currently an intern in Tinkerbox
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,In fact, it is my fellow intern and TechLadies' Kate who invited to speak here today
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,so I am glad to here
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,so now i understand that most of the audience here are beginner level
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,Just to get a gauge, how many of you guys have done OOP in python before?
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,Okay, I will say that for those who have not done anything
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,I hope that by the end of this talk
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,we will get to understand more about
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,what OOP is about
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,'Kay, I would say OOP is like an intermediate level topic
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,but it is a very key topic for you to understand
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,for you to move on to do more advanced stuff
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,so this is why I chose the topic for today
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,but also it is a very broad topic
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,so i don't know how much I can cover in 20 minutes
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,So forgive me if I speak too fast
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,Or skip over certain things
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,okay
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,so
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,just a brief idea of what we will be talking about
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,We will only be covering, like, nuts and bolts
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,of OOP in python
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,So language-specified construct syntax
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,That sort of thing
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,Because I believe for beginners
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,this will be what you will be more interested in
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,but at the same time, i hope i will be able to talk a little bit about
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,what you called Object-oriented design
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,principles of writing good codes
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,with design principles, basically
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,so
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,Before I actually go into the actual materials
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,I have a confession to make
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,The sad truth is, okay maybe not that sad
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,but the truth is that I probably enjoy drawing silly things
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,more than I like programming so
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,as a result, you will see a lot of
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,silly drawings
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,Probably more silly drawings than code
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,in this talk
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,but it is my hope that you know
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,it will sort of give you a visual aid
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,to understanding the concepts
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,that I will be talking about
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,Okay so
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,let's dive right in
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,Nuts and bolts
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,so these are the topics I will be covering
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,Objects Classes & Instances
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,Attributes and Methods
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,Inheritance and Scope
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,And those words have completely
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,flown over your head
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,Do not fear
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,by the end of this talk
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,you should, hopefully,
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,have a rough idea of what it means
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,so
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,let's jump straight into the first...
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,oh wait, sorry. before that
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,i just want to make it clear that
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,in common use right now
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,there are two main python versions
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,so python 2 and python 3
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,there are some differences in these 2 versions
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,so as beginners
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,it can be easy to trip up
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,over these differences
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,so just to be clear that
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,when you read up resources online
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,for example, you should know
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,what the version
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,those resources are talking about
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,which python version they are talking about
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,so for clarification
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,just be clear
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,I am using python 3 for all my examples here
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,alright
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,so objects
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,think of objects as a way of
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,logically encapsulating your code
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,so objects has what we called attributes
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,and methods
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,so let's look at this doggeh over here
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,i like to think of attributes as
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,kinda like
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,adjectives?
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,or properties
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,So for example you say
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,the dog is white
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,or can have a weight of 7 kg
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,so these are like the attributes of the dog
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,on the other hand
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,methods
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,they are kinda more like verbs
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,a dog can wag tail and bark
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,so these are the things
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,the dog can do
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,these are like
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,methods of my dog object
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,this is a slightly lame description
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,but i hope can bring across
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,into the field of what
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,I mean by attributes and method
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,and in fact, you know
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,in python
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,you have your variables and your functions
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,right?
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,so your attributes and methods
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,are just your good ol' friends
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,your variables and functions
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,the only thing is that
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,attributes are kind of like variables
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,that are associated with a certain object
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,and methods are functions
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,that are associated with a certain object
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,in the end,
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,objects basically is a way of calculating data
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,and a form of attributes
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,with functions of procedures
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,in the form of methods
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,Okay
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,so let's look at this dog transcribe into
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,real python code
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,for those who have not done any OOP in python before
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,this syntax might look intimidating but
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,hopefully by the end of it
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,you will be able to understand
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,what's going on
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,The kind of object-oriented programming
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,in python
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,that we are dealing with
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,is called class-based object oriented
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,programming
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,This is the kind of OOP
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,you will find
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,in languages like Ruby, Java, C# and etc.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,Only the most popular kind of OOP
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,Just so you know,
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,there are other kinds out there
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,Class-based OOP
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,you see here that
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,I am defining this class "dog"
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,you should know by now
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,that in python,
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,indentation is intactly(?) significant
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,so all these indented code
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,this is inside the class body.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,This is my class definition.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,Now I am talking about classes
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,Now I have to talk about
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,like explain about
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,classes and instances
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,Because we are talking about class-based OOP
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,so what are classes and instances?
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,So, think of a class as a kind of category
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,where an instance is
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,particular living example
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,of a kind of thing
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,To drive the point across,
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,let me talk about babies
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,Yes! Babies
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,When you think of
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,a baby right..
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,a human baby
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,you kind of have this conception
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,tectonic idea of what babies
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,should look like
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,sweet, tender, angel
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,angelic things
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,That is sort of like class
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,this general category
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,this general idea
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,whereas if you actually
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,see this real living kicking screaming
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,pooping baby
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,you are like
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,"What's this ugly yoda-like thing?"
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,That is kind of like instance
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,that's the real concrete
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,instance of a baby
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,So I hope that kinda brings across the idea
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,of what's the differences between
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,the class and instance
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,Let's go back to the code
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,and in my class
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,so in this class definition right
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,when I define my class
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,you can think of it as
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,defining a custom data type
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,so you know in python
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,we have our built-in types
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,we have integers
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,we have strings
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,we have lists
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,we have dictionaries
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,When you define your class
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,it is as if you are building
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,your own data type
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,And this one data type
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,has its own attributes and
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,its own methods
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,I will go through the stuff here later
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,but let me go down to the code here
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,so what you see down here
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,in this line, line 13
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,this is where I instantiate
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,I create an instance for my class
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,So I am assigning
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,I am creating
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,an instance called "Doggeh"
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,And this the way I construct
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,my instance
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,by calling the, what we called
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,the class constructor
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,So this is the class name
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,the parenthesis
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,I pass in certain arguements
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,to initialise my instance
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,so now I have this Doggeh
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,which is an instance of a dog class
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,Okay
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,so now that we sort of know
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,what classes and instances are
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,let me go back
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,I will start going through the code here
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,So to understand the code in here
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,we have to talk about
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,attributes and methods
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,When we talk about attributes and methods
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,There are two kinds
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,They can be instance attributes or instance methods
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,or they can be class attributes and
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,class methods
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,But for now
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,I will talking about instance attributes
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,and instance methods
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,Because that is what we usually deal with
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,Inside this class body
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,I define several methods
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,for my dog class
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,so these are how you define functions
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,I mean, methods are just functions
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,but they are inside a class
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,This is how I define my methods
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,And
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,you notice that
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,this first method looks kind of special
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,with the double underscore in front
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,So double underscore init double underscore
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,so i will be talking more about this later
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,but let's look at these two
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,func.. methods first
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,Now you will notice something interesting
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,about this method
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,I mean, in the end,
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,these methods are just stuff that
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,they print something to the console
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,right
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,It is going to print "Wag Wag" or
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,"Woof Woof"
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,but there is something interesting about this
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,in the method signature
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,I am actually taking this parameter 'self'
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,and
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,this 'self' is actually an indication
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,to you that
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,these methods are instance methods
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,We can invoke these instance methods
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,by using this Dog syntax over here
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,so I invoke "wag tail" by
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,calling it Doggeh.wag_tail()
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,And just to emphasize that you have
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,to put the parenthesis there
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,to invoke the method
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,