OOP Flashcards
class
Tell Python to make a new type of thing.
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 functions 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” is-a “fish.”
has-a
A phrase to say that something is composed of other things or has a trait, as in “a salmon has-a 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.”
