Update classes.md

contrib/advanced-python/classes.md

@@ -204,15 +204,8 @@ class Derived(Base):
 # Driver code 
 obj1 = Base() 
 print(obj1.a) 
-
-# Uncommenting print(obj1.c) will 
-# raise an AttributeError 
-
-# Uncommenting obj2 = Derived() will 
-# also raise an AttributeError as 
-# private member of base class 
-# is called inside derived class 
-
+# output
+ It will raises error because private members cannot be used outside the class even not for derived classes
 
 **Inheritence**
 ->Inheritance allows us to define a class that inherits all the methods and properties from another class.
@@ -452,4 +445,4 @@ Ostriches cannot fly.
 
 	
 
-       
+