Python内置函数(27)——hasattr

英文文档:
hasattr(object, name)- The arguments are an object and a string. The result is
Trueif the string is the name of one of the object’s attributes,Falseif not. (This is implemented by callinggetattr(object, name)and seeing whether it raises anAttributeErroror not.) - 说明:
- 1. 函数功能用来检测对象object中是否含有名为name的属性,如果有则返回True,如果没有返回False
#定义类A>>> class Student:
def __init__(self,name):
self.name = name
>>> s = Student('Aim')
>>> hasattr(s,'name') #a含有name属性
True
>>> hasattr(s,'age') #a不含有age属性
False
2. 函数实际上是调用getattr(object,name)函数,通过是否抛出AttributeError来判断是否含有属性。
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