On 1/31/2014 7:13 PM, Ethan Furman wrote:
On 01/31/2014 03:47 PM, Ben Finney wrote:
I would prefer it to be clear that “__init__” is called automatically,
*during* the constructor's operation. So, instead of:
Called when the instance is created.
I suggest:
Called automatically by the constructor “__new__” during instance
creation, to initialise the new instance.
But __new__ does not call __init__, type does [1].
If the class is an instance of type, it is type.__call__,
>>> tuple.__call__
<method-wrapper '__call__' of type object at 0x0000000067E8ED30>
I presume it is basically something like this:
class type:
def __call__(self, *args, **kwds):
instance = self.__new__(cls, *args, **kwds)
self.__init__(instance, *args, **kwds)
return instance
.__new__ and .__init__ are the plugins used by the true class instance
constructor.
--
Terry Jan Reedy
--
https://mail.python.org/mailman/listinfo/python-list
