In [50]:

    

class Circle(object):
    # class object attribute
    pi = 3.14
    
    def __init__(self, radius=1):
        self.radius = radius
        
    def area(self):
        return Circle.pi * (self.radius**2)
    
    def set_radius(self, new_radius):
        """
        This method takes input as new_radius and resets the old radius to new_radius
        """
        self.radius = new_radius
        
    def get_radius(self):
        return self.radius
    
    def get_perimeter(self):
        return 2.0 * Circle.pi * self.radius


    

In [51]:

    

m_circle = Circle(5)


    

In [52]:

    

m_circle.area()


    

    
Out[52]:





78.5

In [53]:

    

m_circle.set_radius(15)


    

In [54]:

    

m_circle.radius


    

    
Out[54]:





15

In [55]:

    

m_circle.get_radius()


    

    
Out[55]:





15

In [56]:

    

m_circle.area()


    

    
Out[56]:





706.5

In [57]:

    

m_circle.get_perimeter()


    

    
Out[57]:





94.2

In [4]:

    

class Animal(object):
    
    def __init__(self):
        print 'Animal created'
    
    def whoAmI(self):
        print 'Animal'
    
    def eat(self):
        print 'Eating'


    

In [5]:

    

m_animal = Animal()


    

    




Animal created

In [17]:

    

class Dog(Animal):
    def __init__(self):
        Animal.__init__(self)
        print 'Dog created'
        
    def whoAmI(self):
        print 'Dog'
    
    def bark(self):
        print 'woof'


    

In [18]:

    

m_dog = Dog()


    

    




Animal created
Dog created

In [19]:

    

m_dog.whoAmI()


    

    




Dog

In [20]:

    

m_dog.eat()


    

    




Eating

In [16]:

    

m_dog.bark()


    

    




woof

In [48]:

    

class Book(object):
    def __init__(self, title, author, pages):
        print "A book has been created!!!!"
        self.title = title
        self.author = author
        self.pages = pages
    
    # special methods
    
    def __str__(self):
        return "Title: %s, Author: %s, pages: %s" %(self.title, self.author, self.pages)
    
    def __len__(self):
        return self.pages
    
    def __del__(self):
        print "Book is deleted!"


    

In [49]:

    

m_book = Book('Long fight', 'rustomPotter217', 217)


    

    




A book has been created!!!!

In [50]:

    

print m_book


    

    




Title: Long fight, Author: rustomPotter217, pages: 217

In [51]:

    

len(m_book)


    

    
Out[51]:





217

In [52]:

    

del(m_book)


    

    




Book is deleted!

In [53]:

    

# homework-1


    

In [69]:

    

class Line(object):
    def __init__(self, coor1, coor2):
        self.coor1 = coor1
        self.coor2 = coor2
        self.x1, self.y1 = self.coor1
        self.x2, self.y2 = self.coor2
    
    def distance(self):
        #x1, y1 = self.coor1
        #x2, y2 = self.coor2
        return ((self.x1-self.x2)**2 + (self.y1-self.y2)**2)**0.5
    
    def slope(self):
        return ((self.x2 - self.x1)/(self.y2 - self.y1));


    

In [70]:

    

m_line = Line((1,1), (8,2.5))


    

In [71]:

    

m_line.distance()


    

    
Out[71]:





7.158910531638177

In [72]:

    

m_line.slope()


    

    
Out[72]:





4.666666666666667

In [ ]: