【Python】classの__init__の使い方

pythonでの関数の呼び出し

def some_function(something):
	print(something)

some_function("hello world")

Classにした場合
L インスタンスを生成して処理を実行する
　　L クラスの中の関数をメソッドと呼ぶ

class SomeClass:
	def __init__(self, something):
		self.something = something

	def some_function(self):
		print(self.something)


c = SomeClass("hello world")
c.some_function()

class SomeClass:
	def __init__(self, something):
		self.something = something

	def some_function(self):
		print(self.something)

	def some_function2(self):
		return self.something


c = SomeClass("hello world")
c.some_function()
print(c.some_function2())

selfはインスタンス自身のこと
initはデータの初期化の関数

class MyStatus:
	def __init__(self, age, name, height, weight):
		self.age = age
		self.name = name
		self.height = height
		self.weight = weight

	def print_name(self):
		print(self.name)

	def print_age(self):
		print(self.age)

	def print_height(self):
		print(self.height)

	def print_weight(self):
		print(self.weight)

a = MyStatus(14, "yamada", 160, 55)
a.print_height()	 

コーヒーメーカーのClassを作ってみる

class CoffeeMaker:
	def __init__(self, water, brand, tempreture):
		self.water = water # mill
		self.brand = brand
		self.tempreture = tempreture

	def boiling(self):
		boilingTime = self.water / 10 * self.tempreture
		print(boilingTime)

	def brew(self):
		print(self.brand + "を滴れました")

a = CoffeeMaker(300, "brend", 3)
a.boiling()	
a.brew() 

$ python3 test.py
90.0
brendを滴れました

なるほど、Classと関数とinitの使い方について、自分で例を作ると構造を理解できますね。

phpの場合はinitのところが__contructになります。引数はconstructで定義しています。

class Dog {
private $name;

public function __construct($name) {
$this->name = $name;
}

public function getName(){
echo $this->name;
}
}

$dog = new Dog(“Pochi”);

$dog->getName();
[/code]

ini_set('display_errors', "On");

class CoffeeShop {
	private $order;
	private $pay;

	public function __construct($order, $pay) {
		$this->order = $order;
		$this->pay = $pay;
	}

	public function coffeePrice(){
		switch ($this->order) {
			case "ブレンド":
				echo "price is 330 yen\n";
				$price = 330;
				break;
			case "アメリカン":
				echo "price is 350 yen\n";
				$price = 350;
				break;
			case "アイスコーヒー":
				echo "price is 380 yen\n";
				$price = 380;
				break;
			default:
				echo "not available at this store";
		}

		$change = $this->pay - $price;
		return $change;
	}

	
}

$a = new CoffeeShop("ブレンド", 1000);
$b = $a->coffeePrice();
echo $b;