python添加、修改、删除、访问类对象属性的2种方法

1.直接添加、修改、删除、访问类对象属性

class Employee (object):
  empCount = 0 

  def __init__(self, name, salary) :
    self.name  = name
    self.salary = salary
    Employee.empCount += 1 

  def displayCount(self) :    
    print "total employee ",Employee.empCount
 
  def displayEmployee(self) :
    print "name :",self.name  , ", salary :", self.salary
 
emp1 = Employee("SR", 10000)
emp1.displayCount()
emp1.displayEmployee()
emp1.salary = 20000  
print emp1.salary
emp1.age = 25  
print emp1.age

del emp1.age 

Employee.empCount=500

print Employee.empCount
 
Employee.cc="abc"

print Employee.cc
 
del Employee.empCount

print Employee.empCount

2.使用函数添加、删除、修改、访问类对象属性

'''

'''
class Employee(object):

    empCount=0

 
    def __init__(self,name,salary):

        self.name=name

        self.salary=salary

        Employee.empCount+=1
 
    def  displayCount(self):

        print "total employee ",Employee.empCount

 
    def displayEmployee(self):

        print "name:",self.name,",salary:",self.salary
 
emp1=Employee("SR",100000)

if hasattr(emp1,"name"):

    print u"属性name存在"

else:

    print u"属性name不存在"
   
try:

    a=getattr(emp1,"name")

    print u"name属性的值:",a

except Exception,e:

    print e
 

setattr(emp1,"tel","13111111111")

try:

    a=getattr(emp1,"tel")

    print u"新添加的tel属性的值：",a

except Exception,e:

    print e
 
try:

    delattr(emp1,"tel")

except Exception,e:

    print e

else:

    if hasattr(emp1,"tel"):

        print u"属性tel存在"

    else:

        print u"属性tel不存在"