Object Oriented Flashcards
object
Two meanings: the most basic type of thing, and any instance of some thing
instance
What you get when you tell Python to create a class
def
How you define a function inside a class
self
Inside the function in a class, self is a variable for the instance/object being accessed
inheritance
The concept that one class can inherit traits from another class, much like you and your parents
composition
The concept that a class can be composed of other classes as parts, much like how a car has wheels
attribute
A property classes have that are from composition and are usually variables
is-a
A phrase to say that something inherits from another, as in a “salmon” *phrase* “fish”
has-a
A phrase to say that something is composed of other things or has a trait, as in “a salmon *phrase* mouth”
classX(Y)
Make a class named X that is-a Y
class X(object): def __init__(self, J)
class X has-a __init__ that takes self and J parameters
class X(object): def M(self, J)
class X has-a function named M that takes self and J parameters
foo = X()
Set foo to an instance of class X
foo.M(J)
From foo get the M function, and call it with parameters self, J
foo.K = Q
From foo get the K attribute and set it to Q
