파이썬 기초 문법 3

class Person:      # 대문자소문자 입력.
  
  # class attribute
  country = "korean"

  # instance attribute
  def __init__(self, name, age):   # def __init__(self) 고정적 default
    self.name = name
    self.age = age

  # instance method 정의
  def singing(self,songtitle, sales):
    return "{} 판매량 {} 된 {}을 노래합니다.".format(self.name, sales, songtitle)

if __name__ == "__main__":
  kim = Person("Kim", 100)
  lee = Person("Lee", 100)

  # access class attribute
  print("kim은 {}".format(kim.__class__.country))
  print("lee는 {}".format(lee.__class__.country))

  # call instance
  print(kim.singing("A", 10))
  print(lee.singing("B", 200))

class Parent:
  # instance attribute
  def __init__(self, name, age):
    self.name = name
    self.age = age

  # instance method 정의
  def whoAmI(self):
    print(" I am Parent!!")

  def singing(self,songtitle):
    return "{} {}을 노래합니다.".format(self.name, songtitle)

  def dancing(self):
    return "{} 현재 춤을 춥니다.".format(self.name)

class Child(Parent):
  def __init__(self, name, age):
    # super() function
    super().__init__(name, age)
    print("Child Class is ON")

  def whoAmI(self):
    print("I am Child")

  def studying(self):
    print("I am Fast Runner")


if __name__ == "__main__":
  child_kim = Child("kim", 15)
  parent_kim = Parent("kim", 45)
  print(child_kim.dancing())
  print(child_kim.singing("연애"))
  #print(parent_kim.studying()) # AttributeError: 'Parent' object has no attribute 'studying' **parent 클래스에 정의 되어있지 않아서 에러가 남"
  child_kim.whoAmI()
  parent_kim.whoAmI()

class TV:

  # init constructor
  def __init__(self):
    self.__maxprice = 500

  def sell(self):
    print("Selling Price: {}".format(self.__maxprice))

  def setMaxPrice(self, price):
    self.__maxprice = price

if __name__ == "__main__":
  tv = TV()
  tv.sell()

  # change price
  # 안 바뀌는 코드의 예시
  tv.__maxprice = 1000
  tv.sell()

  # setMaxPrice
  # 값을 바꿀 수있다!? 외부의 입력값을 업데이트 할 수 있다!
  tv.setMaxPrice(1000)
  tv.sell()

class Employee:

  # init constructor
  # nmae , salary
  def __init__(self, name, salary = 0):
    self.name = name

    # 조건문 추가
    if salary > 0:
      self.salary = salary
    else:
      self.salary = 0
      print("급여는 0원이 될수 없다!. 다시 입력하십시오!!")

  def update_salary(self, amount):
    self.salary += amount

  def weekly_salary(self):
    return self.salary / 7

if __name__ == "__main__":
  emp01 = Employee("Winters", -50000)
  print(emp01.name)
  print(emp01.salary)
  emp01.salary += 1500
  print(emp01.salary)
  emp01.update_salary(3000)
  print(emp01.salary)
  week_salary = emp01.weekly_salary()
  print(week_salary)

class Person:
  """
  사람을 표현하는 클래스
  

 
  Attributes
  ------------
  name : str
    name of the person

  age : int
    age of the person

  Methods
  -------------
 
  info(additional=""):
    prints the person's name and age
  """
  def __init__(self, name, age):
    """
    Constructs all the neccessary attributes for the person object
  
    Parameters(매개변수)
    -------------------------
      name : str
        name of the person

      age : int
        age of the person
    """

    self.name = name
    self.age = age

  def info(self, additional = None):
    """
    귀찮음...
    
    Parameters
    --------------
      additional : str, optional
        more info to be displayed (Default is None) / A, B, C


    Returens
    -----------
      None

    """

    print(f'My name is {self.name}. I am {self.age} years old. ' + additional)

if __name__ == "__main__":
    person = Person("Evan", age = 20)
    person.info("나의 직장은 00이야")
    help(Person)