subclass

I have these 4 java clases: 1 public class Rect { double width; double height; String color; public Rect( ) { width=0; height=0; color="transparent"; } public Rect( double w,double h) { width=w; height=h; color="transparent"; } double area() { return width*height; } } 2 public class PRect extends Rect{ double depth; public PRect(double w, double h ,double d) { width=w; height=h; depth=d; } double area() { return width*height*depth; } } 3 public class CRect extends Rect{ String color; public CRect(double w, double h ,String c) { width=w; height=h; color=c; } double area() { return width*height;

The following code works: class Foo(tuple): def __init__(self, b): super(Foo, self).__init__(tuple(b)) if __name__ == '__main__': print Foo([3, 4]) $ python play.py Result: play.py:4: DeprecationWarning: object.__init__() takes no parameters super(Foo, self).__init__(tuple(b)) (3, 4) But not the following: class Foo(tuple): def __init__(self, a, b): super(Foo, self).__init__(tuple(b)) if __name__ == '__main__': print Foo(None, [3, 4]) $ python play.py Result: Traceback (most recent call last): File "play.py", line 7, in <module> print Foo(None, [3, 4]) TypeError: tuple() takes at most 1

To check if a type is a subclass of another type in C#, it's easy: typeof (SubClass).IsSubclassOf(typeof (BaseClass)); // returns true However, this will fail: typeof (BaseClass).IsSubclassOf(typeof (BaseClass)); // returns false Is there any way to check whether a type is either a subclass OR of the base class itself, without using an OR operator or using an extension method? Lasse Vågsæther Karlsen Apparently, no. Here's the options: Use Type.IsSubclassOf Use Type.IsAssignableFrom is and as Type.IsSubclassOf As you've already found out, this will not work if the two types are the same, here