[Python-Dev] About [].append == [].append

[Antoine Pitrou]

On Thu, 21 Jun 2018 13:25:19 +0200
Jeroen Demeyer <J.Demeyer at UGent.be> wrote:
> Currently, we have:
> 
>  >>> [].append == [].append  
> False
> 
> However, with a Python class:
> 
>  >>> class List(list):  
> ...     def append(self, x): super().append(x)
>  >>> List().append == List().append  
> True
> 
> In the former case, __self__ is compared using "is" and in the latter 
> case, it is compared using "==".
> 
> I think that comparing using "==" is the right thing to do because "is" 
> is really an implementation detail.

Probably... though comparing bound methods doesn't sound terribly
useful, so I'm not sure how much of an issue this is in practice.

Regards

Antoine.