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
True
if the string is the name of one of the object’s attributes,False
if not. (This is implemented by callinggetattr(object, name)
and seeing whether it raises anAttributeError
or 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。