标签：ace highlight hat assign obj common set nts __str__
英文文档
class object
Return a new featureless object. object is a base for all classes. It has the methods that are common to all instances of Python classes. This function does not accept any arguments.
Note：object does not have a __dict__, so you can’t assign arbitrary attributes to an instance of the object class.
说明：
Object类是Python中所有类的基类，如果定义一个类时没有指定继承那个类，则默认继承object类
>>> class A:
pass
>>> issubclass(A,object)
True
object类定义了所有类的一些公共方法
>>> dir(object) [‘__class__‘, ‘__delattr__‘, ‘__dir__‘, ‘__doc__‘, ‘__eq__‘, ‘__format__‘, ‘__ge__‘, ‘__getattribute__‘, ‘__gt__‘, ‘__hash__‘, ‘__init__‘, ‘__le__‘, ‘__lt__‘, ‘__ne__‘, ‘__new__‘, ‘__reduce__‘, ‘__reduce_ex__‘, ‘__repr__‘, ‘__setattr__‘, ‘__sizeof__‘, ‘__str__‘, ‘__subclasshook__‘]
object没有定义__dict__，所以不能对object类实例对象尝试设置属性
>>> a = object()
>>> a.name = ‘kim‘ # 不能设置属性
Traceback (most recent call last):
File "<pyshell#9>", line 1, in <module>
a.name = ‘kim‘
AttributeError: ‘object‘ object has no attribute ‘name‘
#定义一个类A
>>> class A:
pass
>>> a = A()
>>>
>>> a.name = ‘kim‘ # 能设置属性
标签：ace highlight hat assign obj common set nts __str__
原文地址：https://www.cnblogs.com/yyf573462811/p/9591678.html
