@@ -157,4 +157,68 @@ def __init__(self,name,breed,age):
157157 def __sound (self ):
158158 print ("Woof" )
159159 def __eat (self ,meal ):
160- print (f"{ self .__name } { meal } )
160+ print (f"{ self .__name } { meal } )
161+ 162+ c1 = Dog ("Bella" ,"germen" ,"4" )
163+ c1 .__name = "Bella" # This will raise an AttributeError
164+ # c1.__sound() # This will raise an AttributeError
165+ # c1.__eat("Biscuit") # This will raise an AttributeError
166+ 167+ #how to access the private attributes
168+ c1 ._Dog__name = "Bella"
169+ c1 ._Dog__sound ()
170+ c1 ._Dog__eat ("Biscuit" )
171+ print (c1 ._Dog__name )
172+ print (c1 ._Dog__breed )
173+ print (c1 ._Dog__age ) # This will print 0 because we didn't pass
174+ 175+ 176+ # POLYMORPHISM
177+ class Animal :
178+ def sound (self ):
179+ pass
180+ class Dog (Animal ):
181+ def sound (self ):
182+ return "Woof"
183+ class Cat (Animal ):
184+ def sound (self ):
185+ return "Meow"
186+ 187+ 188+ c2 = Cat ()
189+ c3 = Dog ()
190+ print (c2 .sound ()) # Output: Meow
191+ print (c3 .sound ()) # Output: Woof
192+ 193+ #ABSTRACTION
194+ from abc import ABC , abstractmethod
195+ class Shape :
196+ @abstractmethod
197+ def area (self ):
198+ pass
199+ @abstractmethod
200+ def perimeter (self ):
201+ pass
202+ class Circle :
203+ def __init__ (self ,r ):
204+ self .radius = r
205+ def area (self ):
206+ return 3.14 * (self .radius ** 2 )
207+ def perimeter (self ):
208+ return 2 * 3.14 * self .radius
209+ class Rectangle :
210+ def __init__ (self ,l ,w ):
211+ self .length = l
212+ self .width = w
213+ def area (self ):
214+ return self .length * self .width
215+ def perimeter (self ):
216+ return 2 * (self .length + self .width )
217+ 218+ c = Circle (5 )
219+ r = Rectangle (4 ,5 )
220+ print (c .area ())
221+ print (c .perimeter ())
222+ print (r .area ())
223+ print (r .perimeter ())
224+
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