class Celsius:
    def __init__(self, temperature=0):
        # This calls the setter method `temperature(self, value)` below 
        self.temperature = temperature

    def to_farenheit(self):
        # This calls the getter method (`temperature(self)`) method below
        return (self.temperature * 1.8) + 32

    @property
	def temperature(self):
        """
        Getter method for the `temperature` property.
        If you create an instance of this class and then refer to the
            `temperature` property of that instance then this method will be called.

        Example:
            t = Celsius(37)
            t.temperature  <-- this is where this getter method is called
        """
        print("Getting value...")
        return self._temperature

    @temperature.setter
    def temperature(self, value):
        """
        Setter method for the `temperature` property.
        If you create an instance of this class and then assign a value
            to the `temperature` property of that instance then this method will be called.

        Example:
            t = Celsius(37)  <-- this is where this setter method is called
            t.temperature  
        """
        print("Setting value...")
        if value < -273.15:
            raise ValueError("Temperature below -273 is not possible")
        self._temperature = value


human = Celsius(37)  # Setting value...
print(human.temperature)  # Getting value...
print(human.to_farenheit())  # Setting value...
coldest_thing = Celsius(-300)  # ValueError

class Dates:
    def __init__(self, date):
    	self.date = date

    def get_date(self):
    	return self.date

    @staticmethod
    def format_date_with_dashes(date):
      	# Replace / with -
    	return date.replace("/", "-")


slash_date = "10/20/2024"
# Calling format_date_with_dashes() like any other function, but preceded by it's class name
dash_date = Dates.format_date_with_dashes(slash_date)

print(dash_date)  # 10-20-2024

from datetime import date


# random Person
class Person:
    def __init__(self, name, age):
        self.name = name
        self.age = age

    @classmethod
    def from_birth_year(cls, name, birth_year):
    	# Since `cls` refers to the class itself (`Person`), calling this
        #	`classmethod` creates an instance of `Person`.
    	return cls(name, date.today().year - birth_year)

    def display(self):
    	print(f"{self.name}'s age is: {self.age}")


bob = Person("Bob", 25)
bob.display()  # Bob's age is: 25

alice = Person.from_birth_year("Alice", 1985)
alice.display()  # Alice's age is: 39

class Rectangle:
    def __init__(self, length, width):
    	self.length = length
		self.width = width

    def area(self):
    	return self.length * self.width


class Square(Rectangle):
    def __init__(self, length):
        # Call the __init__ method of the parent class (Rectangle)
        # super() refers to the parent class of this class
        # Actually using the __init__ method of `Rectangle` here
        #	which needs 2 parameters, `length` and `width`. Since
        #	a square is length==width then we use `length` twice.
    	super().__init__(length, length)


my_square = Square(5)
my_square.area()  # 25

from abc import ABC, abstractmethod


class Shape(ABC):
# Shape is an abstract base class

    @abstractmethod
    def area(self):
        pass


class Circle(Shape):
# Circle is a class that inherits from the abstract Shape class

    def __init__(self, radius):
    	self.radius = radius
	
    def area(self):
   	# As a child of an Abstract class, this child class MUST define
    #	it's own implementation of this abstractmethod
    	return 3.14 * self.radius ** 2


class Square(Shape):
# Square is a class that inherits from the abstract Shape class

    def __init__(self, side):
    	self.side = side

    def area(self):
    # As a child of an Abstract class, this child class MUST define
    #	it's own implementation of this abstractmethod
    	return self.side ** 2

<ul id="birds">
  <li>Orange-winged parrot</li>
  <li class="endangered">Philippine eagle</li>
  <li>Great white pelican</li>
</ul>



<script>
    
const birds = document.querySelectorAll('li');

for (const bird of birds) {
  if (bird.matches('.endangered')) {
    console.log(`The ${bird.textContent} is endangered!`);
  }
}

    </script>