Class



In [2]:

    
class Rectangle(object):
    def __init__(self, w=0, h=0):
        self.w=w
        self.h=h
    
    def get_area(self):
        return self.w*self.h
    
    def __str__(self):
        return "w:{}, h:{}, area:{}".format(self.w, self.h, self.get_area())



In [4]:

    
rec = Rectangle()
print(rec)









    



w:0, h:0, area:0



In [6]:

    
rec = Rectangle(w=3,h=4)
print(rec)









    



w:3, h:4, area:12

Inheritance

level2

bullet
bullet $e^x$



In [7]:

    
class Square(Rectangle):
    def __init__(self, e=0):
        self.w=e
        self.h=e



In [8]:

    
sq=Square(5)
print(sq)









    



w:5, h:5, area:25



In [ ]: