[Python-ideas] IntFlags

[Neil Girdhar]

Also +1.

I think IntFlags should also have a named constructor that constructs an 
IntFlags instance from a set:

reduce(lambda x, y: x | y, (c[key] for key in some_set))

Best,

Neil

On Tuesday, March 3, 2015 at 5:04:50 PM UTC-5, Cameron Simpson wrote:
>
> On 03Mar2015 19:27, Serhiy Storchaka <stor... at gmail.com <javascript:>> 
> wrote: 
> >On 03.03.15 18:40, Ethan Furman wrote: 
> >>This was in my original Enum code, but stripped out as not being needed 
> at the time. 
> >> 
> >>If there is sufficient interest (and use-cases) I can add it back in. 
> > 
> >This would be good. I need IntFlags even more than IntEnum. 
>
> I am also +1. 
>
> I also probably use IntFlags (euqivalents) more often than IntEnums. It 
> would 
> have been nice for my PEP-418 demo implementation: 
>
>   
> https://bitbucket.org/cameron_simpson/css/src/tip/lib/python/cs/clockutils.py 
>
> I rolled my own _Clock_Flags there for this very reason. 
>
> >I made an implementation based on early implementations of IntEnum, 
> >but then IntEnum was changed too much and became incompatible with my 
> >extension. 
> > 
> >IntFlags should be a separate class, IntEnum is good with its 
> restrictions. 
>
> I agree. I presume IntEnum|IntEnum might return an IntFlags? Or would that 
> make 
> for a TypeError or ValueError and one be expected to start with IntFlags? 
>
> Cheers, 
> Cameron Simpson <c... at zip.com.au <javascript:>> 
>
> Trust the computer... the computer is your friend. 
>         - Richard Dominelli <dom... at panix.com <javascript:>> 
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