Python內建函數Object

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英文文檔

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.

說明：

Object類是Python中所有類的基類，如果定義一個類時沒有指定繼承那個類，則預設繼承object類

>>> class A:    pass>>> issubclass(A,object)True

　　

object類定義了所有類的一些公用方法

>>> 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沒有定義__dict__，所以不能對object類執行個體對象嘗試設定屬性

>>> a = object()>>> a.name = ‘kim‘ # 不能設定屬性Traceback (most recent call last):  File "<pyshell#9>", line 1, in <module>    a.name = ‘kim‘AttributeError: ‘object‘ object has no attribute ‘name‘#定義一個類A>>> class A:    pass>>> a = A()>>> >>> a.name = ‘kim‘ # 能設定屬性

　　

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Python內建函數Object