[Python-ideas] "Immutable Builder" Pattern and Operator

[Joao S. O. Bueno]

This is easy to do in Python, and we already have NamedTuples and
other things.


If you need such a builder anyway, this snippet can work - no need for
special syntax:

https://gist.github.com/jsbueno/b2b5f5c06caa915c451253bb4f171ee9



On 22 January 2017 at 20:54, Serhiy Storchaka <storchaka at gmail.com> wrote:
> On 23.01.17 00:45, Soni L. wrote:
>>
>> I've been thinking of an Immutable Builder pattern and an operator to go
>> with it. Since the builder would be immutable, this wouldn't work:
>>
>> long_name = mkbuilder()
>> long_name.seta(a)
>> long_name.setb(b)
>> y = long_name.build()
>
>
> I think the more pythonic way is:
>
> y = build(a=a, b=b)
>
> A Builder pattern is less used in Python due to the support of keyword
> arguments.
>
>
>
> _______________________________________________
> Python-ideas mailing list
> Python-ideas at python.org
> https://mail.python.org/mailman/listinfo/python-ideas
> Code of Conduct: http://python.org/psf/codeofconduct/