python3 Object Oriented class __ Built in properties and methods for example code

0. object class source code

class object:
  """ The most base type """
  def __delattr__(self, *args, **kwargs): # real signature unknown
    """ Implement delattr(self, name). """
    pass
  def __dir__(self): # real signature unknown; restored from __doc__
    """
    __dir__() -> list
    default dir() implementation
    """
    return []
  def __eq__(self, *args, **kwargs): # real signature unknown
    """ Return self==value. """
    pass
  def __format__(self, *args, **kwargs): # real signature unknown
    """ default object formatter """
    pass
  def __getattribute__(self, *args, **kwargs): # real signature unknown
    """ Return getattr(self, name). """
    pass
  def __ge__(self, *args, **kwargs): # real signature unknown
    """ Return self>=value. """
    pass
  def __gt__(self, *args, **kwargs): # real signature unknown
    """ Return self>value. """
    pass
  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
  def __init__(self): # known special case of object.__init__
    """ Initialize self. See help(type(self)) for accurate signature. """
    pass
  def __le__(self, *args, **kwargs): # real signature unknown
    """ Return self<=value. """
    pass
  def __lt__(self, *args, **kwargs): # real signature unknown
    """ Return self<value. """
    pass
  @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
  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
  def __repr__(self, *args, **kwargs): # real signature unknown
    """ Return repr(self). """
    pass
  def __setattr__(self, *args, **kwargs): # real signature unknown
    """ Implement setattr(self, name, value). """
    pass
  def __sizeof__(self): # real signature unknown; restored from __doc__
    """
    __sizeof__() -> int
    size of object in memory, in bytes
    """
    return 0
  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
  __class__ = None # (!) forward: type, real value is ''
  __dict__ = {}
  __doc__ = ''
  __module__ = ''

1. Built-in attribute specification

①__class__: Indicates which class of the module the object is in

__dict__: Prints all properties and methods of the class (including those inherited from the base class) (including built-in properties and methods).

__dict__: Prints all properties of the object (private and public).

conclusion