Another python class example

class Shape:
    def __init__(self,x1,y1):
          self.x=x1
          self.y=y1
          self.description="This shape has not been described yet"
          self.author="Nobody has claimed to make this shape yet"

     def area(self):
           return self.x*self.y

    def perimeter(self):
          return 2*self.x+2*self.y

    def describe(self,text):
          self.description=text

    def authorName(self,text):
          self.author=text

    def scaleSize(self,scale):
         self.x=self.x*scale
         self.y=self.y*scale


to run:

aa=Shape(5,6)

aa.scaleSize(0.2)

print aa.scaleSize(0.2)

output:

(0.2, 0.24000)