python_step02,03,04

최초 작성일 : 2021-12-14
categories: Python

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파이썬에 있는 'inheritance' 대해 실습 해 보았다.

#/c/Program Files/anaconda3/envs/Python_f/python # -*- conding: utf-8 -*-  class Employee:     def __init__(self, name, tip):         self.name = name         self.tip = tip    if __name__=="__main__":     emp1 = Employee("kim", 10000)     emp2 = Employee("Lee", 10000)    # 100명을 고용 

#/c/Program Files/anaconda3/envs/Python_f/python # -*- conding: utf-8 -*- # Class Attribute   class Employee:      #Class Attribute     MAX_TIP = 10000     DEFAULT_TIP = 20000      def __init__(self, name, tip = 0):         self.name = name         if tip >= Employee.MAX_TIP:             self.tip = Employee.MAX_TIP         else:             self.tip = Employee.DEFAULT_TIP    if __name__ == "__main__":     emp1 = Employee("kim")     print(emp1.tip)     emp2 = Employee("Lee", 10000)     print(emp2.tip) 

<실행 화면>

"C:\Program Files\anaconda3\python.exe" "C:c/Program Files/anaconda3/envs/Python_f/python/inheritance02.py" 20000 10000 

"C:\Program Files\anaconda3\python.exe" "C:c/Program Files/anaconda3/envs/Python_f/python/inheritance03.py" name kim evan A B C D F  Process finished with exit code 0 

#/c/Program Files/anaconda3/envs/Python_f/python # -*- coding: utf-8 -*-  """ - 클래스 메서드 사용 - 정적 메서드 사용 - 날짜 입력 예제 - "2021-12-13" """  from datetime import datetime  class BetterDate:      def __init__(self, year, month, day):         self.year = year         self.month = month         self.day = day      @classmethod     def from_str(cls, date_str):         parts = date_str.split("-") # 2021-12-17         year, month, day = int(parts[0]), int(parts[1]), int(parts[2])         return cls(year, month, day)      @staticmethod     def from_str2(date_str):         parts = date_str.split("-")  # 2021-12-17         BetterDate.year, BetterDate.month, BetterDate.day = int(parts[0]), int(parts[1]), int(parts[2])         return BetterDate.year, BetterDate.month, BetterDate.day      @classmethod     def from_datetime(cls, dateobj):         year, month, day = dateobj.year, dateobj.month, dateobj.day         return cls(year, month, day)  if __name__ == "__main__":      bd_str = BetterDate.from_str("2021-12-13")     print("---- Date String----")     # print("연도는 {}")     print(bd_str.year)     print(bd_str.month)     print(bd_str.day)      bd_str2 = BetterDate.from_str2("2021-12-13")     print("---- Date String----")     # print("연도는 {}")     print(bd_str2[0])     print(bd_str2[1])     print(bd_str2[2])      today = datetime.today()     print("Today", today)     print("Type", type(today))     bd_str3 = BetterDate.from_datetime(today)     print("---- Date Datetime----")     # print("연도는 {}")     print(bd_str3.year)     print(bd_str3.month)     print(bd_str3.day) 

<실행 화면>

"C:\Program Files\anaconda3\python.exe" "C:c/Program Files/anaconda3/envs/Python_f/python/inheritance04.py" name kim evan A B C D F  Process finished with exit code 0 

#/c/Program Files/anaconda3/envs/Python_f/python # -*- coding: utf-8 -*-  """ 모방 (부모 클래스를 모방) 모방 한 뒤, 자식이 창조 """  import pandas as pd  class newDataFrame(pd.DataFrame):     pass    if __name__=="__main__":     temp_dict = {"A": [1, 2, 3], "B": [4, 5, 6]}     temp = pd.DataFrame(temp_dict, columns=["B", "A"])     #print(temp)     print("---------")     temp2 = newDataFrame(temp_dict, columns=["B", "A"])     print(temp2) 

<실행 화면>

"C:\Program Files\anaconda3\python.exe" "C:c/Program Files/anaconda3/envs/Python_f/python/inheritance05.py" ---------    B  A 0  4  1 1  5  2 2  6  3  Process finished with exit code 0 

#/c/Program Files/anaconda3/envs/Python_f/python # -*- coding: utf-8 -*-  class Employee:     MIN_TIP =3000      def __init__(self, name, tip = MIN_TIP):         self.name = name         if tip >= Employee.MIN_TIP:             self.tip = tip         else:             self.tip  =Employee.MIN_TIP      def give_raise(self, amount):         self.tip += amount  class Manager(Employee):     pass   if __name__=="__main__":     mng = Manager("Evan", 5000)     print(mng.name)     print(mng.tip) 

<실행 화면>

"C:\Program Files\anaconda3\python.exe" "C:c/Program Files/anaconda3/envs/Python_f/python/inheritance06.py" Kim 5000  Process finished with exit code 0 

#/c/Program Files/anaconda3/envs/Python_f/python # -*- coding: utf-8 -*-  class Employee:      def __init__(self, name, tip = 30000):         self.name = name         self.tip = tip      def give_raise(self, amount):         self.tip += amount         return self.tip  class Manager(Employee):     def disaply(self):         print("Manager: ", self.name)      def __init__(self, name, tip = 50000, project=None):         Employee.__init__(self, name, tip)         self.project = project       # give_raise     def give_raise(self, amount = 0, bouns = 2):         if amount > 0:            Employee.give_raise(self, amount * bouns)         else:             Employee.give_raise(self, amount)  if __name__=="__main__":     mng = Manager("Kim")     print(mng.name)     print(mng.tip)     mng.give_raise(2000, bouns=3)     print(mng.tip) 

<실행 화면>

"C:\Program Files\anaconda3\python.exe" "C:c/Program Files/anaconda3/envs/Python_f/python/inheritance07.py" Kim 50000 56000  Process finished with exit code 0