Python Fundamentals: Special Methods for classes

classRectangle:'this is a rectangular class'    def __init__(self,length,width):ifIsinstance (length, (int,float)) andisinstance (width, (int,float)): Self.length=length Self.width=widthElse:            RaiseTypeError#return None    defArea (self): areas= Self.length *Self.widthreturnareasdef __str__(self):return 'width is%s, height is%s'%(self.width,self.length)def __repr__(self):return 'area is:%s'%(Self.area ())def __call__(self):return 'This is a call method'    def __add__(self,other): Add_length= Self.length +other.length add_width= Self.width +Other.widthreturnAdd_length,add_width b= Rectangle (3,5) b.__dict__B.__doc__ #print (b)b C= Rectangle (4,6)

Python Fundamentals: Special Methods for classes