Python Object Oriented - Classes

• Creating Classes:

  The class statement creates a new class definition. The name of the class immediately follows the keyword class followed by a colon as follows:
  class ClassName:
  'Optional class documentation string'
  class_suite
  
  The class has a documentation string which can be access via ClassName.__doc__.
  
  The class_suite consists of all the component statements, defining class members, data attributes, and functions.

  Example:

  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

• Creating instance objects:

  "This would create first object of Employee class"
  emp1 = Employee("Zara", 2000)
  "This would create second object of Employee class"
  emp2 = Employee("Manni", 5000)

• Accessing attributes:

  You access the object's attributes using the dot operator with object. Class variable would be accessed using class name as follows:
  
  emp1.displayEmployee()
  emp2.displayEmployee()
  print "Total Employee %d" % Employee.empCount