Permalink: http://www.treeweb.es/u/1296/
16/10/2015
Inheritance and POO with Python
#-*- coding: utf-8 -*-
u"""
Inheritance and POO with Python
"""
class Coordinates(object):
def __init__(self, x=0, y=0):
self.x = x
self.y = y
class Point(Coordinates):
def __init__(self, x=0, y=0):
super(Point, self).__init__(x,y)
def draw(self):
print '(%s, %s)' % (self.x, self.y)
class Figure(object): # Abstract!
figure = 'Figure'
def __init__(self):
self.coordinates = Coordinates()
def draw(self):
raise Exception("You should implement `draw` method.")
class Line(Figure):
figure = 'Line'
def __init__(self):
self.points = [] # Points
def add(self, point):
return self.points.append(point)
def draw(self):
print 'I am a line with %s points:' % len(self.points)
for point in self.points:
point.draw()
class Group(Figure):
figure = 'Group'
def __init__(self):
self.figures = [] # Figures
def add(self, figure):
return self.figures.append(figure)
def draw(self):
print 'I am a group with %s figures:' % len(self.figures)
for figure in self.figures:
figure.draw()
if __name__ == '__main__':
line1 = Line()
line1.add(Point(1,1))
line1.add(Point(1,2))
line2 = Line()
line2.add(Point(10,1))
line2.add(Point(20,2))
line2.add(Point(30,3))
group1 = Group()
group1.add(line1)
group1.add(line2)
group1.draw()
