Class and instance attributes in Python

Python Methods and Functions

# Write Python code here

class sampleclass:

count = 0   # class attribute


def increase ( self ):

sampleclass.count + = 1

# IN Calling increment () for object

s1 = sampleclass ()

s1.increase () 

print s1.count

# The call will increase by one more
# object

s2 = sampleclass ()

s2.increase ()

print s2.count


print sampleclass.count


 1 2 2 

Instance Attributes

Unlike class attributes, instance attributes are not I am common to objects. Each object has its own copy of an instance attribute (in the case of class attributes, all objects refer to one copy).

To list the attributes of an instance / object, we have two functions:
1.vars () — this function displays an instance attribute as a dictionary. 
2.dir () — this function displays more attributes than the vars function because it is not instance limited. It also renders class attributes.

# Python program to demonstrate
# instance attributes

class emp:

def __ init __ ( self ):

self .name = ' xyz'

self . salary = 4000


def show ( self ):

print self . name

print self . salary


e1 = emp ()

print "Dictionary form:" , vars ( e1)

print dir (e1)


 Dictionary form: {'salary': 4000,' name': 'xyz'} [' __doc__', '__init__',' __module__', 'name',' salary', ' show'] 

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