Python object类中的特殊方法代码讲解类中的特殊方法代码讲解
在本篇文章里小编给各位整理了关于Python object类中的特殊方法代码讲解，需要的朋友们可以参考下。
python版本：版本：3.8
class object:
""" The most base type """
# del obj.xxx或delattr(obj,'xxx')时被调用，删除对象中的一个属性
def __delattr__(self, *args, **kwargs): # real signature unknown
""" Implement delattr(self, name). """
pass
# 对应dir(obj)，返回一个列表，其中包含所有属性和方法名（包含特殊方法）
def __dir__(self, *args, **kwargs): # real signature unknown
""" Default dir() implementation. """
pass
# 判断是否相等 equal ，在obj==other时调用。如果重写了__eq__方法，则会将__hash__方法置为None
def __eq__(self, *args, **kwargs): # real signature unknown
""" Return self==value. """
pass
# format(obj)是调用，实现如何格式化obj对象为字符串
def __format__(self, *args, **kwargs): # real signature unknown
""" Default object formatter. """
pass
# getattr(obj,'xxx')、obj.xxx时都会被调用，当属性存在时，返回值，不存在时报错（除非重写__getattr__方法来处理）。
# 另外，hasattr(obj,'xxx')时也会被调用（估计内部执行了getattr方法）
def __getattribute__(self, *args, **kwargs): # real signature unknown
""" Return getattr(self, name). """
pass
# 判断是否大于等于 greater than or equal，在obj>=other时调用
def __ge__(self, *args, **kwargs): # real signature unknown
""" Return self>=value. """
pass
# 判断是否大于 greater than，在obj>other时调用
def __gt__(self, *args, **kwargs): # real signature unknown
""" Return self>value. """
pass
# 调用hash(obj)获取对象的hash值时调用
def __hash__(self, *args, **kwargs): # real signature unknown
""" Return hash(self). """
pass
def __init_subclass__(self, *args, **kwargs): # real signature unknown
"""
This method is called when a class is subclassed.
The default implementation does nothing. It may be
overridden to extend subclasses.
"""
pass
# object构造函数，当子类没有构造函数时，会调用object的__init__构造函数
def __init__(self): # known special case of object.__init__
""" Initialize self. See help(type(self)) for accurate signature. """
pass
# 判断是否小于等于 less than or equal，在obj<=other时调用
def __le__(self, *args, **kwargs): # real signature unknown
""" Return self<=value. """
pass
# 判断是否小于 less than，在obj<other时调用
def __lt__(self, *args, **kwargs): # real signature unknown
""" Return self<value. """
pass
# 创建一个cls类的对象，并返回
@staticmethod # known case of __new__
def __new__(cls, *more): # known special case of object.__new__
""" Create and return a new object. See help(type) for accurate signature. """
pass
# 判断是否不等于 not equal,在obj!=other时调用
def __ne__(self, *args, **kwargs): # real signature unknown
""" Return self!=value. """
pass
def __reduce_ex__(self, *args, **kwargs): # real signature unknown
""" Helper for pickle. """
pass
def __reduce__(self, *args, **kwargs): # real signature unknown
""" Helper for pickle. """
pass
# 如果不重写__str__，则__repr__负责print(obj)和交互式命令行中输出obj的信息
# 如果重写了__str__，则__repr__只负责交互式命令行中输出obj的信息
def __repr__(self, *args, **kwargs): # real signature unknown
""" Return repr(self). """
pass
# 使用setattr(obj,'xxx',value)、obj.xxx=value是被调用（注意，构造函数初始化属性也要调用）
def __setattr__(self, *args, **kwargs): # real signature unknown
""" Implement setattr(self, name, value). """
pass
# 获取对象内存大小
def __sizeof__(self, *args, **kwargs): # real signature unknown
""" Size of object in memory, in bytes. """
pass
# 设置print(obj)打印的信息，默认是对象的内存地址等信息
def __str__(self, *args, **kwargs): # real signature unknown
""" Return str(self). """
pass
@classmethod # known case
def __subclasshook__(cls, subclass): # known special case of object.__subclasshook__
"""
Abstract classes can override this to customize issubclass().
This is invoked early on by abc.ABCMeta.__subclasscheck__().
It should return True, False or NotImplemented. If it returns
NotImplemented, the normal algorithm is used. Otherwise, it
overrides the normal algorithm (and the outcome is cached).
"""
pass
# 某个对象是由什么类创建的，如果是object，则是type类<class 'type'>
__class__ = None
# 将对象中所有的属性放入一个字典，例如{'name':'Leo','age':32}
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