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class
tell Python to make a new kind of thing
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object
two meanings: the most basic kind of thing, and any instance of some thing
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instance
what you get when you tell Python to create a class
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def
how you define a function inside a class
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self
inside the functions in a class, self is a variable for the instance/object being accessed
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inheritance
the concept that one class can inherit traits from another class, much like you and your parents
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composition
the concept that a class can be composed of other classes as parts, much like how a car has wheels
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attribute
a property classes have that are from composition and are usually variables
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is-a
a phrase to say that something inherits from another, as in a Salman is-a Fish
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has-a
a phrase to say that something is composed of other things or has a trait, as in a Salmon has-a mouth
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class X(Y)
"Make a class named X that is-a Y."
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class X(object): def __init__(self, J)
"class X has-a __init__ that takes self and J parameters."
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class X(object): def M(self, J)
"class X has-a function named M that takes self and J parameters."
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foo = X()
"Set foo to an instance of class X."
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foo.M(J)
"From foo get the M function, and call it with parameters self, J."
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foo.K = Q
"From foo get the K attribute and set it to Q."
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