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Date: Thu, 12 Sep 2013 11:05:25 -0700
From: Ethan Furman <ethan@stoneleaf.us>
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To: python-list@python.org
Subject: Re: Language design
References: <522eb795$0$29999$c3e8da3$5496439d@news.astraweb.com> <5230D58E.9020508@markusrother.de> <5230DD68.2080703@stoneleaf.us> <5231FF23.20600@markusrother.de>
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Xref: csiph.com comp.lang.python:54075

On 09/12/2013 10:51 AM, Markus Rother wrote:
> On 11.09.2013 23:15, Ethan Furman wrote:
>> On 09/11/2013 01:41 PM, Markus Rother wrote:
>>>       >>> () == []
>>>       False
>>>
>>>       But:
>>>
>>>       >>> bool(().__eq__([]))
>>>       True
>>
>> This is not a trap, this is simply the wrong way to do it.  The magic
>> methods (aka dunder methods) are there for Python to call, not you
>> (except under special circumstances, such as when writing your own
>> dunder methods).
>
> While trying to do it, I learned that its not the right way to do it.
> However, I was not satisfied with the fact, that there is no built in
> pure function for operations on primitives.  Such that
>
>>>> def get_do_stuff (fn):
> ...     def do_stuff(x,y):
> ...         return fn(x,y)
> ...     return do_stuff
>
> I understand that python is not a functional language, but it
> frustrates me at times.

--> import operator
--> operator.__all__  # public api methods are in __all__
['abs', 'add', 'and_', 'attrgetter', 'concat', 'contains', 'countOf', 'delitem', 'eq', 'floordiv', 'ge', 'getitem', 
'gt', 'iadd', 'iand', 'iconcat', 'ifloordiv', 'ilshift', 'imod', 'imul', 'index', 'indexOf', 'inv', 'invert', 'ior', 
'ipow', 'irshift', 'is_', 'is_not', 'isub', 'itemgetter', 'itruediv', 'ixor', 'le', 'length_hint', 'lshift', 'lt', 
'methodcaller', 'mod', 'mul', 'ne', 'neg', 'not_', 'or_', 'pos', 'pow', 'rshift', 'setitem', 'sub', 'truediv', 'truth', 
'xor']

Imports are a Good Thing; not everything has to be built in.

--
~Ethan~