#!/usr/bin/python
 
class Employee:
   'Common base class for all employees'
   empCount = 0
 
   def __init__(self, name, salary):
      self.name = name
      self.salary = salary
      Employee.empCount += 1
 
   def displayCount(self):
     print "Total Employee %d" % Employee.empCount
 
   def displayEmployee(self):
      print "Name : ", self.name,  ", Salary: ", self.salary
 
"This would create first object of Employee class"
emp1 = Employee("Zara", 2000)
"This would create second object of Employee class"
emp2 = Employee("Manni", 5000)
emp1.displayEmployee()
emp2.displayEmployee()
print "Total Employee %d" % Employee.empCount
 
// Built-In Class Attributes
 
print "Employee.__doc__:", Employee.__doc__
print "Employee.__name__:", Employee.__name__
print "Employee.__module__:", Employee.__module__
print "Employee.__bases__:", Employee.__bases__
print "Employee.__dict__:", Employee.__dict__
 
// Destroying Objects (Garbage Collection)
del emp1
 
// Class Inheritance
#!/usr/bin/python
 
class Parent:        # define parent class
   parentAttr = 100
   def __init__(self):
      print "Calling parent constructor"
 
   def parentMethod(self):
      print 'Calling parent method'
 
   def setAttr(self, attr):
      Parent.parentAttr = attr
 
   def getAttr(self):
      print "Parent attribute :", Parent.parentAttr
 
class Child(Parent): # define child class
   def __init__(self):
      print "Calling child constructor"
 
   def childMethod(self):
      print 'Calling child method'
 
c = Child()          # instance of child
c.childMethod()      # child calls its method
c.parentMethod()     # calls parent's method
c.setAttr(200)       # again call parent's method
c.getAttr()          # again call parent's method
 
 
// Overriding Methods
#!/usr/bin/python
 
class Parent:        # define parent class
   def myMethod(self):
      print 'Calling parent method'
 
class Child(Parent): # define child class
   def myMethod(self):
      print 'Calling child method'
 
c = Child()          # instance of child
c.myMethod()         # child calls overridden method