In [1]:

    

class Object:
    pass

obj = Object()


    

In [2]:

    

type(obj)


    

    
Out[2]:





instance

In [3]:

    

def square(num):
    return num**2


    

In [4]:

    

type(square)


    

    
Out[4]:





function

In [5]:

    

type(Object)


    

    
Out[5]:





classobj

In [11]:

    

class Sample(object): # not clear why this "object" is here
    pass


    

In [7]:

    

x = Sample()


    

In [8]:

    

type(x)


    

    
Out[8]:





__main__.Sample

In [35]:

    

class Dog(object):
    
    # class object attribute
    species = 'mammal'
    
    def __init__(self, breed, name, fur=True):
        # looks like you dont need to declare this vars in the class for 
        # them to be generated. neat. 
        self.breed = breed
        self.name = name
        self.fur = fur
        
    def bark(self):
        print("SAY WOOF AGAIN. I DARE YOU.")


    

In [36]:

    

sam = Dog(breed='lab', name='sammy', fur=False)


    

In [37]:

    

sam.bark()


    

    




SAY WOOF AGAIN. I DARE YOU.

In [52]:

    

class Circle(object):
    pi = 3.14
    
    def __init__(self, radius=1):
        self.radius = radius
        
    def area(self):
        return (self.radius**2) * Circle.pi
    
    def set_radius(self, new_radius):
        self.radius = new_radius


    

In [49]:

    

c = Circle(20) # looks like you dont need to name the params, just use the right order?
c.area()
c.set_radius(100)
c.area()


    

    
Out[49]:





31400.0

In [53]:

    

class Animal(object):
    
    def __init__(self):
        print "Animal Created"
        
    def whoAmI(self):
        print "Animal"
        
    def eat(self):
        print "Eating"


    

In [60]:

    

class Dog(Animal):
    def __init__(self):
        Animal.__init__(self) # interesting syntax
        print "Dog Created"
        
    def whoAmI(self):
        print("Dog")


    

In [61]:

    

d = Dog()


    

    




Animal Created
Dog Created

In [62]:

    

d.whoAmI()


    

    




Dog

In [80]:

    

class Book(object):
    
    def __init__(self, title, author, pages):
        self.title = title
        self.author = author
        self.pages = pages
        
    #special functions
    
    # this is the equiv of customstringconvertable
    def __str__(self):
        return "Title: {t}, Author: {a}, Pages: {pg}".format(t=self.title, a=self.author, pg=self.pages)

    def __len__(self):
        return self.pages
    
    # deinit
    def __del__(self):
        print("Deleting %s!" % self.title)


    

In [77]:

    

b = Book(author="Louis",pages=25,title="Python Trials")
# so params don't need to be in the same order if they are named...


    

In [70]:

    

print(b)


    

    




Title: Python Trials, Author: Louis, Pages: 25

In [75]:

    

len(b)


    

    
Out[75]:





25

In [78]:

    

del(b)


    

    




Deleting Python Trials!

In [79]:

    

print(b)


    

    




---------------------------------------------------------------------------
NameError                                 Traceback (most recent call last)
<ipython-input-79-4851c8fca996> in <module>()
----> 1 print(b)

NameError: name 'b' is not defined

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