# -*- coding: utf-8 -*-#python 27#xiaodeng#python之函数用法getattr()#getattr()#说明：'''getattr(...)    getattr(object, name[, default]) -> value    default:默认值        Get a named attribute from an object; getattr(x, 'y') is equivalent to x.y.    When a default argument is given, it is returned when the attribute doesn't    exist; without it, an exception is raised in that case.'''#案例class A():        def __init__(self):           self.a = 'a'            def method(self):           #print "method print"        return 'xiaodeng'a = A()#如果有属性a则打印a，否则打印defaultprint getattr(a, 'a', 'default')        #a#如果有属性b则打印b，否则打印default print getattr(a, 'b', 'default')        #default#如果有方法method,否则打印其地址,否则打印defaultprint getattr(a, 'method', 'default')   #
     
      >#如果有方法method,运行函数并打印None否则打印defaultprint getattr(a, 'test', 'default')     #default