浅析Python中的getattr(),setattr(),delattr(),hasattr()

class A: 
def __init__(self): 
self.name = 'zhangjing' 
　　 #self.age=''
def method(self): 
print"method print" 
Instance = A() 
print getattr(Instance , 'name, 'not find') #如果Instance 对象中有属性name则打印self.name的值，否则打印'not find'
print getattr(Instance , 'age', 'not find') #如果Instance 对象中有属性age则打印self.age的值，否则打印'not find'
print getattr(a, 'method', 'default') 
#如果有方法method，否则打印其地址，否则打印default 
print getattr(a, 'method', 'default')() 
#如果有方法method，运行函数并打印None否则打印default 

import statsout 
def output(data, format="text"): 
output_function = getattr(statsout, "output_%s" % format) 
return output_function(data) 
setattr(object, name, value)
This is the counterpart of getattr(). The arguments
are an object, a string and an arbitrary value. The string may name an existing
attribute or a new attribute. The function assigns the value to the attribute,
provided the object allows it. For example, setattr(x,
'foobar', 123) is equivalent to
x.foobar = 123.