在Python中创建实例对象
要创建类的实例，请使用类名称调用该类，然后传递其__init__方法接受的任何参数。
"This would create first object of Employee class"
emp1 = Employee("Zara", 2000)
"This would create second object of Employee class"
emp2 = Employee("Manni", 5000)您可以使用带点运算符和对象来访问对象的属性。将使用类名称访问类变量，如下所示：
emp1.displayEmployee() emp2.displayEmployee() print "Total Employee %d" % Employee.empCount
示例
现在，将所有概念放在一起-
#!/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输出结果
执行以上代码后，将产生以下结果-
Name : Zara ,Salary: 2000 Name : Manni ,Salary: 5000 Total Employee 2
您可以随时添加，删除或修改类和对象的属性-
emp1.age = 7 # Add an 'age' attribute. emp1.age = 8 # Modify 'age' attribute. del emp1.age # Delete 'age' attribute.
可以使用以下功能代替使用普通语句访问属性：
GETATTR（OBJ，名称[，默认]）-访问对象的属性。
该hasattr（OBJ，名）-检查一个属性存在与否。
该SETATTR（OBJ，名称，值）-设置属性。如果属性不存在，则将创建它。
该delattr（OBJ，名）-删除一个属性。
hasattr(emp1, 'age') # Returns true if 'age' attribute exists getattr(emp1, 'age') # Returns value of 'age' attribute setattr(emp1, 'age', 8) # Set attribute 'age' at 8 delattr(empl, 'age') # Delete attribute 'age'