Extreme Thinking
Rython class

2020-06-20


我不常用 class 還是紀錄一下 :

class Point:
    def __init__(self, initX, initY):

        self.x = initX
        self.y = initY

    def getX(self):
        return self.x

    def getY(self):
        return self.y

    def distanceFromOrigin(self):
        return ((self.x ** 2) + (self.y ** 2)) ** 0.5

    def move(self, dx, dy):
        self.x = self.x + dx
        self.y = self.y + dy

    def __str__(self):
        return str(self.x)+","+str(self.y)
    
    def reflect_x(self):
        return(self.x,-self.y)

print (Point(3, 5))
print (Point(3, 5).reflect_x())

class 繼承

from random import randrange

# Here's the original Pet class
class Pet():
    boredom_decrement = 4
    hunger_decrement = 6
    boredom_threshold = 5
    hunger_threshold = 10
    sounds = ['Mrrp']
    def __init__(self, name = "Kitty"):
        self.name = name
        self.hunger = randrange(self.hunger_threshold)
        self.boredom = randrange(self.boredom_threshold)
        self.sounds = self.sounds[:]  # copy the class attribute, so that when we make changes to it, we won't affect the other Pets in the class

    def clock_tick(self):
        self.boredom += 1
        self.hunger += 1

    def mood(self):
        if self.hunger <= self.hunger_threshold and self.boredom <= self.boredom_threshold:
            return "happy"
        elif self.hunger > self.hunger_threshold:
            return "hungry"
        else:
            return "bored"

    def __str__(self):
        state = "     I'm " + self.name + ". "
        state += " I feel " + self.mood() + ". "
        # state += "Hunger %d Boredom %d Words %s" % (self.hunger, self.boredom, self.sounds)
        return state

    def hi(self):
        print(self.sounds[randrange(len(self.sounds))])
        self.reduce_boredom()

    def teach(self, word):
        self.sounds.append(word)
        self.reduce_boredom()

    def feed(self):
        self.reduce_hunger()

    def reduce_hunger(self):
        self.hunger = max(0, self.hunger - self.hunger_decrement)

    def reduce_boredom(self):
        self.boredom = max(0, self.boredom - self.boredom_decrement)

class Dog(Pet):
    sounds = ['Woof', 'Ruff']

    def feed(self):
        Pet.feed(self)
        print("Arf! Thanks!")

d1 = Dog("Astro")

class Bird(Pet):
    sounds = ["chirp"]
    def __init__(self, name="Kitty", chirp_number=2):
        Pet.__init__(self, name) # call the parent class's constructor
        # basically, call the SUPER -- the parent version -- of the constructor, with all the parameters that it needs.
        self.chirp_number = chirp_number # now, also assign the new instance variable

    def hi(self):
        for i in range(self.chirp_number):
            print(self.sounds[randrange(len(self.sounds))])
        self.reduce_boredom()