python word drill 1

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python word drill 1
2014-01-03 14:46:59
python learning

word drill
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  1. class :
    Tell Python to make a new kind of thing.
  2. object :
    Two meanings: the most basic kind of thing, and any instance of some thing.
  3. instance :
    What you get when you tell Python to create a class.
  4. def :
    How you define a function inside a class.
  5. self :
    Inside the functions in a class, self is a variable for the instance/object being accessed.
  6. inheritance :
    The concept that one class can inherit traits from another class, much like you and your parents.
  7. composition :
    The concept that a class can be composed of other classes as parts, much like how a car has wheels.
  8. attribute :
    A property classes have that are from composition and are usually variables.
  9. is-a :
    A phrase to say that something inherits from another, as in a "salmon" is-a "fish."
  10. has-a :
    A phrase to say that something is composed of other things or has a trait, as in "a salmon has-a mouth."
  11. class X(Y)
    "Make a class named X that is-a Y."
  12. class X(object): def __init__(self, J)
    "class X has-a __init__ that takes self and J parameters."
  13. class X(object): def M(self, J)
    "class X has-a function named M that takes self and J parameters."
  14. foo = X()
    "Set foo to an instance of class X."
  15. foo.M(J)
    "From foo get the M function, and call it with parameters self, J."
  16. foo.K = Q
    "From foo get the K attribute and set it to Q."