On Wed, Oct 8, 2014 at 2:05 PM, Gelonida N <gelon...@gmail.com> wrote:
> On 10/8/2014 9:09 PM, Terry Reedy wrote: > >> On 10/8/2014 6:57 AM, Steven D'Aprano wrote: >> >> According to the documentation, operator.__add__ is the "official" >>> function, >>> and operator.add is just there for convenience. >>> >> >> You are paraphrasing "The function names are those used for special >> class methods; variants without leading and trailing __ are also >> provided for convenience." But then there is the following: >> >> 10.3.1. Mapping Operators to Functions >> >> This table shows how abstract operations correspond to operator symbols >> in the Python syntax and the functions in the operator module. >> Operation Syntax Function >> Addition a + b add(a, b) >> >> etc, using the 'convenient' names. I would like to deprecate and >> eventually remove the dunder names. To me, the duplication is not >> 'convenient'. >> >> > > I'd be curious about a proposal to obsolete the double underscore > functions and just keep operator.add or to just keep the operator + > > For me they seem rather distinct, though they are interchangable in > certain situations. > > Perhaps I got something wrong, but all dunder functions are 'magic' > functions. Many of them mostly should ne used when when overloading > behaviour or when creating a class which should implement operators. > > print(dosomething(operator.add, 1, 2)) > print(dosomething(operator.add, a, b)) The thing being purposed to remove, is that you can also do: print(dosomething(operator.__add__, 1, 2)) print(dosomething(operator.__add__, a, b)) Not that fact that you can define __add__ in the class, or that "operator.add(a, b)" is the same as "a + b" (all of which are quite useful). Basically, the operator module has a "__add__" function in addition to a "add" function, and they are both identical (in fact, they are the same function object): >>> import operator >>> operator.add <built-in function add> >>> operator.__add__ <built-in function add> >>> operator.__add__ is operator.add True
-- https://mail.python.org/mailman/listinfo/python-list